From 0a2266d4052ebb3272042af7f260de3d572596a7 Mon Sep 17 00:00:00 2001
From: Titus <tituswormer@gmail.com>
Date: Tue, 1 Jun 2021 11:01:05 +0200
Subject: [PATCH 01/10] Use `pull_request_target` in bb

---
 .github/workflows/bb.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/bb.yml b/.github/workflows/bb.yml
index 291ab09..0198fc3 100644
--- a/.github/workflows/bb.yml
+++ b/.github/workflows/bb.yml
@@ -2,7 +2,7 @@ name: bb
 on:
   issues:
     types: [opened, reopened, edited, closed, labeled, unlabeled]
-  pull_request:
+  pull_request_target:
     types: [opened, reopened, edited, closed, labeled, unlabeled]
 jobs:
   main:

From 7d8d2b0881ead57e3d106d50865d6546a54ede7d Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Fri, 23 Jul 2021 11:59:22 +0200
Subject: [PATCH 02/10] Fix types for changes in `@types/unist`

---
 lib/util.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/util.js b/lib/util.js
index 5a921b2..aaa4583 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -12,6 +12,7 @@ import {convertElement} from 'hast-util-is-element'
  * @returns {node is Parent}
  */
 export function parent(node) {
+  // @ts-expect-error: hush.
   return Array.isArray(node.children)
 }
 

From 45a7ae87544eaf9e9f622dad85c3e2df076f7f42 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Fri, 23 Jul 2021 12:10:00 +0200
Subject: [PATCH 03/10] Refactor code-style

---
 lib/any.js         |  16 ++---
 lib/attribute.js   |  10 +--
 lib/class-name.js  |   4 +-
 lib/enter-state.js |  30 ++++----
 lib/nest.js        |  30 ++++----
 lib/parse.js       |  18 +++--
 lib/pseudo.js      |  38 +++++-----
 package.json       |   5 +-
 test/all.js        |   2 +-
 test/matches.js    | 172 +++++++++++++++++++++++++++------------------
 test/select-all.js |  66 ++++++++---------
 test/select.js     |  68 +++++++++---------
 test/svg.js        |   2 +-
 13 files changed, 237 insertions(+), 224 deletions(-)

diff --git a/lib/any.js b/lib/any.js
index 1f71db8..f986db9 100644
--- a/lib/any.js
+++ b/lib/any.js
@@ -15,7 +15,7 @@ import {nest} from './nest.js'
 import {pseudo} from './pseudo.js'
 import {test} from './test.js'
 
-var type = zwitch('type', {
+const type = zwitch('type', {
   unknown: unknownType,
   invalid: invalidType,
   handlers: {selectors, ruleSet, rule}
@@ -39,8 +39,8 @@ export function any(query, node, state) {
  * @returns {Array.<Element>}
  */
 function selectors(query, node, state) {
-  var collector = new Collector(state.one)
-  var index = -1
+  const collector = new Collector(state.one)
+  let index = -1
 
   while (++index < query.selectors.length) {
     collector.collectAll(ruleSet(query.selectors[index], node, state))
@@ -66,7 +66,7 @@ function ruleSet(query, node, state) {
  * @returns {Array.<Element>}
  */
 function rule(query, tree, state) {
-  var collector = new Collector(state.one)
+  const collector = new Collector(state.one)
 
   if (state.shallow && query.rule) {
     throw new Error('Expected selector without nesting')
@@ -94,7 +94,7 @@ function rule(query, tree, state) {
 
   /** @type {SelectIterator} */
   function iterator(query, node, index, parent, state) {
-    var exit = enterState(state, node)
+    const exit = enterState(state, node)
 
     if (test(query, node, index, parent, state)) {
       if (query.rule) {
@@ -116,8 +116,8 @@ function rule(query, tree, state) {
    * @returns {S}
    */
   function configure(query, state) {
-    var pseudos = query.pseudos || []
-    var index = -1
+    const pseudos = query.pseudos || []
+    let index = -1
 
     while (++index < pseudos.length) {
       if (pseudo.needsIndex.includes(pseudos[index].name)) {
@@ -164,7 +164,7 @@ class Collector {
    * @param {Array.<Element>} elements
    */
   collectAll(elements) {
-    var index = -1
+    let index = -1
 
     while (++index < elements.length) {
       this.collect(elements[index])
diff --git a/lib/attribute.js b/lib/attribute.js
index f49e85f..df596e9 100644
--- a/lib/attribute.js
+++ b/lib/attribute.js
@@ -13,7 +13,7 @@ import {find} from 'property-information'
 import {stringify as spaces} from 'space-separated-tokens'
 import {zwitch} from 'zwitch'
 
-var handle = zwitch('operator', {
+const handle = zwitch('operator', {
   unknown: unknownOperator,
   invalid: exists,
   handlers: {
@@ -33,8 +33,8 @@ var handle = zwitch('operator', {
  * @returns {boolean}
  */
 export function attribute(query, element, schema) {
-  var attrs = query.attrs
-  var index = -1
+  const attrs = query.attrs
+  let index = -1
 
   while (++index < attrs.length) {
     if (!handle(attrs[index], element, find(schema, attrs[index].name))) return
@@ -79,7 +79,7 @@ function exact(query, element, info) {
  * @returns {boolean}
  */
 function spaceSeparatedList(query, element, info) {
-  var value = element.properties[info.property]
+  const value = element.properties[info.property]
 
   return (
     // If this is a comma-separated list, and the query is contained in it, return
@@ -104,7 +104,7 @@ function spaceSeparatedList(query, element, info) {
  * @returns {boolean}
  */
 function exactOrPrefix(query, element, info) {
-  var value = normalizeValue(element.properties[info.property], info)
+  const value = normalizeValue(element.properties[info.property], info)
 
   return (
     hasProperty(element, info.property) &&
diff --git a/lib/class-name.js b/lib/class-name.js
index 16daf64..c65589d 100644
--- a/lib/class-name.js
+++ b/lib/class-name.js
@@ -11,8 +11,8 @@
 export function className(query, element) {
   /** @type {Array.<string>} */
   // @ts-ignore Assume array.
-  var value = element.properties.className || []
-  var index = -1
+  const value = element.properties.className || []
+  let index = -1
 
   while (++index < query.classNames.length) {
     if (!value.includes(query.classNames[index])) return
diff --git a/lib/enter-state.js b/lib/enter-state.js
index 679abca..8c023dd 100644
--- a/lib/enter-state.js
+++ b/lib/enter-state.js
@@ -20,30 +20,24 @@ import {element} from './util.js'
  */
 // eslint-disable-next-line complexity
 export function enterState(state, node) {
-  var schema = state.schema
-  var language = state.language
-  var currentDirection = state.direction
-  var editableOrEditingHost = state.editableOrEditingHost
+  const schema = state.schema
+  const language = state.language
+  const currentDirection = state.direction
+  const editableOrEditingHost = state.editableOrEditingHost
   /** @type {Direction|null} */
-  var dirInferred
-  /** @type {string} */
-  var type
+  let dirInferred
   /** @type {boolean} */
-  var found
-  /** @type {string} */
-  var lang
-  /** @type {Direction|null} */
-  var dir
+  let found
 
   if (element(node)) {
     // @ts-ignore Assume string.
-    lang = node.properties.xmlLang || node.properties.lang
+    const lang = node.properties.xmlLang || node.properties.lang
     // @ts-ignore Assume string.
-    type = node.properties.type || 'text'
-    dir = dirProperty(node)
+    const type = node.properties.type || 'text'
+    const dir = dirProperty(node)
 
     if (lang !== undefined && lang !== null) {
-      state.language = lang
+      state.language = String(lang)
       found = true
     }
 
@@ -138,7 +132,7 @@ export function enterState(state, node) {
  * @returns {Direction}
  */
 function dirBidi(value) {
-  var result = direction(value)
+  const result = direction(value)
   return result === 'neutral' ? null : result
 }
 
@@ -147,7 +141,7 @@ function dirBidi(value) {
  * @returns {Direction}
  */
 function dirProperty(node) {
-  var value =
+  const value =
     element(node) && typeof node.properties.dir === 'string'
       ? node.properties.dir.toLowerCase()
       : null
diff --git a/lib/nest.js b/lib/nest.js
index b0c09d7..a749e29 100644
--- a/lib/nest.js
+++ b/lib/nest.js
@@ -12,9 +12,9 @@ import {zwitch} from 'zwitch'
 import {enterState} from './enter-state.js'
 import {parent, element} from './util.js'
 
-var own = {}.hasOwnProperty
+const own = {}.hasOwnProperty
 
-var handle = zwitch('nestingOperator', {
+const handle = zwitch('nestingOperator', {
   unknown: unknownNesting,
   invalid: topScan, // `undefined` is the top query selector.
   handlers: {
@@ -53,7 +53,7 @@ function topScan(query, node, index, parent, state) {
 
 /** @type {Handler} */
 function descendant(query, node, index, parent, state) {
-  var previous = state.iterator
+  const previous = state.iterator
 
   state.iterator = iterator
   child(query, node, index, parent, state)
@@ -103,16 +103,14 @@ function generalSibling(query, _, index, parent, state) {
  * @param {boolean} [firstElementOnly=false]
  */
 function indexedSearch(query, parent, state, from, firstElementOnly) {
-  var handle = state.index ? delay : add
-  var children = parent.children
-  var elements = 0
-  var index = -1
+  const handle = state.index ? delay : add
+  const children = parent.children
+  let elements = 0
+  let index = -1
   /** @type {Object.<string, number>} */
-  var types = {}
+  const types = {}
   /** @type {Array.<Function>} */
-  var delayed = []
-  /** @type {Node} */
-  var child
+  const delayed = []
 
   // Start looking at `from`
   if (from === undefined || from === null) from = 0
@@ -123,7 +121,7 @@ function indexedSearch(query, parent, state, from, firstElementOnly) {
   // If we need to index for types, do so for all elements before `from`.
   if (state.index) {
     while (++index < from) {
-      child = children[index]
+      const child = children[index]
       if (element(child)) count(child.tagName)
     }
   }
@@ -131,7 +129,7 @@ function indexedSearch(query, parent, state, from, firstElementOnly) {
   index = from - 1
 
   while (++index < children.length) {
-    child = children[index]
+    const child = children[index]
     // Only check elements.
     // Check either all elements, or only check the first sibling
     if (element(child)) {
@@ -157,8 +155,8 @@ function indexedSearch(query, parent, state, from, firstElementOnly) {
    * @param {number} childIndex
    */
   function delay(node, childIndex) {
-    var elementsBefore = elements
-    var elementsByTypeBefore = own.call(types, node.tagName)
+    const elementsBefore = elements
+    const elementsByTypeBefore = own.call(types, node.tagName)
       ? types[node.tagName]
       : 0
 
@@ -184,7 +182,7 @@ function indexedSearch(query, parent, state, from, firstElementOnly) {
    * @param {number} childIndex
    */
   function add(node, childIndex) {
-    var exit = enterState(state, node)
+    const exit = enterState(state, node)
     state.iterator(query, node, childIndex, parent, state)
     exit()
   }
diff --git a/lib/parse.js b/lib/parse.js
index 2d3112f..60f643a 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -13,18 +13,18 @@ import {zwitch} from 'zwitch'
 
 /** @type {import('nth-check').default} */
 // @ts-ignore
-var nthCheck = fauxEsmNthCheck.default
+const nthCheck = fauxEsmNthCheck.default
 
-var nth = new Set([
+const nth = new Set([
   'nth-child',
   'nth-last-child',
   'nth-of-type',
   'nth-last-of-type'
 ])
 
-var parser = new CssSelectorParser()
+const parser = new CssSelectorParser()
 
-var compile = zwitch('type', {handlers: {selectors, ruleSet, rule}})
+const compile = zwitch('type', {handlers: {selectors, ruleSet, rule}})
 
 parser.registerAttrEqualityMods('~', '|', '^', '$', '*')
 parser.registerSelectorPseudos('any', 'matches', 'not', 'has')
@@ -48,7 +48,7 @@ export function parse(selector) {
  * @returns {Selectors}
  */
 function selectors(query) {
-  var index = -1
+  let index = -1
 
   while (++index < query.selectors.length) {
     compile(query.selectors[index])
@@ -70,13 +70,11 @@ function ruleSet(query) {
  * @returns {Rule}
  */
 function rule(query) {
-  var pseudos = query.pseudos || []
-  var index = -1
-  /** @type {RulePseudo|RulePseudoNth} */
-  var pseudo
+  const pseudos = query.pseudos || []
+  let index = -1
 
   while (++index < pseudos.length) {
-    pseudo = pseudos[index]
+    const pseudo = pseudos[index]
 
     if (nth.has(pseudo.name)) {
       // @ts-ignore Patch a non-primitive type.
diff --git a/lib/pseudo.js b/lib/pseudo.js
index af360f6..a31ad07 100644
--- a/lib/pseudo.js
+++ b/lib/pseudo.js
@@ -19,7 +19,7 @@ import {whitespace} from 'hast-util-whitespace'
 import {zwitch} from 'zwitch'
 import {any} from './any.js'
 
-var handle = zwitch('name', {
+const handle = zwitch('name', {
   unknown: unknownPseudo,
   invalid: invalidPseudo,
   handlers: {
@@ -76,8 +76,8 @@ pseudo.needsIndex = [
  * @returns {boolean}
  */
 export function pseudo(query, element, index, parent, state) {
-  var pseudos = query.pseudos
-  var offset = -1
+  const pseudos = query.pseudos
+  let offset = -1
 
   while (++offset < pseudos.length) {
     if (!handle(pseudos[offset], element, index, parent, state)) return
@@ -95,15 +95,13 @@ export function pseudo(query, element, index, parent, state) {
  * @returns {boolean}
  */
 function matches(query, element, _1, _2, state) {
-  var shallow = state.shallow
-  var one = state.one
-  /** @type {boolean} */
-  var result
+  const shallow = state.shallow
+  const one = state.one
 
   state.shallow = true
   state.one = true
 
-  result = any(query.value, element, state)[0] === element
+  const result = any(query.value, element, state)[0] === element
 
   state.shallow = shallow
   state.one = one
@@ -457,8 +455,8 @@ function onlyOfType(query, _1, _2, _3, state) {
  * @returns {boolean}
  */
 function someChildren(element, check) {
-  var children = element.children
-  var index = -1
+  const children = element.children
+  let index = -1
 
   while (++index < children.length) {
     if (check(children[index])) return true
@@ -501,18 +499,16 @@ function assertDeep(state, query) {
  * @returns {boolean}
  */
 function has(query, element, _2, _3, state) {
-  var shallow = state.shallow
-  var one = state.one
-  var scopeElements = state.scopeElements
-  var value = appendScope(query.value)
-  /** @type {boolean} */
-  var result
+  const shallow = state.shallow
+  const one = state.one
+  const scopeElements = state.scopeElements
+  const value = appendScope(query.value)
 
   state.shallow = false
   state.one = true
   state.scopeElements = [element]
 
-  result = any(value, element, state).length > 0
+  const result = any(value, element, state).length > 0
 
   state.shallow = shallow
   state.one = one
@@ -527,14 +523,12 @@ function has(query, element, _2, _3, state) {
  */
 function appendScope(value) {
   /** @type {Selectors} */
-  var selector =
+  const selector =
     value.type === 'ruleSet' ? {type: 'selectors', selectors: [value]} : value
-  var index = -1
-  /** @type {Rule} */
-  var rule
+  let index = -1
 
   while (++index < selector.selectors.length) {
-    rule = selector.selectors[index].rule
+    const rule = selector.selectors[index].rule
     rule.nestingOperator = null
 
     if (
diff --git a/package.json b/package.json
index f9107b2..f91a948 100644
--- a/package.json
+++ b/package.json
@@ -88,10 +88,7 @@
   "xo": {
     "prettier": true,
     "rules": {
-      "max-params": "off",
-      "unicorn/no-array-for-each": "off",
-      "no-var": "off",
-      "prefer-arrow-callback": "off"
+      "max-params": "off"
     }
   },
   "remarkConfig": {
diff --git a/test/all.js b/test/all.js
index a982238..5de05e1 100644
--- a/test/all.js
+++ b/test/all.js
@@ -3,7 +3,7 @@ import {u} from 'unist-builder'
 import {h} from 'hastscript'
 import {selectAll} from '../index.js'
 
-test('all together now', function (t) {
+test('all together now', (t) => {
   t.deepEqual(
     selectAll(
       'dl > dt.foo:nth-of-type(odd)',
diff --git a/test/matches.js b/test/matches.js
index fe39468..6fa32a0 100644
--- a/test/matches.js
+++ b/test/matches.js
@@ -3,10 +3,10 @@ import {u} from 'unist-builder'
 import {h, s} from 'hastscript'
 import {matches} from '../index.js'
 
-test('select.matches()', function (t) {
-  t.test('invalid selector', function (t) {
+test('select.matches()', (t) => {
+  t.test('invalid selector', (t) => {
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         matches()
       },
@@ -15,7 +15,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         matches([], h(''))
       },
@@ -24,7 +24,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches('@supports (transform-origin: 5% 5%) {}', h(''))
       },
       /Error: Rule expected but "@" found./,
@@ -32,7 +32,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches('[foo%=bar]', h(''))
       },
       /Error: Expected "=" but "%" found./,
@@ -40,7 +40,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches(':active', h(''))
       },
       /Error: Unknown pseudo-selector `active`/,
@@ -48,7 +48,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches(':nth-foo(2n+1)', h(''))
       },
       /Error: Unknown pseudo-selector `nth-foo`/,
@@ -56,7 +56,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches('::before', h(''))
       },
       /Error: Unexpected pseudo-element or empty pseudo-class/,
@@ -64,7 +64,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches('foo bar', h(''))
       },
       /Error: Expected selector without nesting/,
@@ -72,7 +72,7 @@ test('select.matches()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         matches('foo > bar', h(''))
       },
       /Error: Expected selector without nesting/,
@@ -82,8 +82,8 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('parent-sensitive pseudo-selectors', function (t) {
-    var simplePseudos = [
+  t.test('parent-sensitive pseudo-selectors', (t) => {
+    const simplePseudos = [
       'first-child',
       'first-of-type',
       'last-child',
@@ -91,38 +91,42 @@ test('select.matches()', function (t) {
       'only-child',
       'only-of-type'
     ]
-
-    var functionalPseudos = [
+    const functionalPseudos = [
       'nth-child',
       'nth-last-child',
       'nth-of-type',
       'nth-last-of-type'
     ]
+    let index = -1
 
-    simplePseudos.forEach(function (pseudo) {
+    while (++index < simplePseudos.length) {
+      const pseudo = simplePseudos[index]
       t.throws(
-        function () {
+        () => {
           matches(':' + pseudo, h(''))
         },
         new RegExp('Error: Cannot use `:' + pseudo + '` without parent'),
         'should throw on `' + pseudo + '`'
       )
-    })
+    }
 
-    functionalPseudos.forEach(function (pseudo) {
+    index = -1
+
+    while (++index < functionalPseudos.length) {
+      const pseudo = functionalPseudos[index]
       t.throws(
-        function () {
+        () => {
           matches(':' + pseudo + '()', h(''))
         },
         new RegExp('Error: Cannot use `:' + pseudo + '` without parent'),
         'should throw on `' + pseudo + '()`'
       )
-    })
+    }
 
     t.end()
   })
 
-  t.test('general', function (t) {
+  t.test('general', (t) => {
     t.notOk(matches('', h('')), 'false for the empty string as selector')
     t.notOk(matches(' ', h('')), 'false for a white-space only selector')
     t.notOk(matches('*'), 'false if not given a node')
@@ -134,14 +138,14 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('multiple selectors', function (t) {
+  t.test('multiple selectors', (t) => {
     t.ok(matches('b, i', h('b')), 'true for string')
     t.notOk(matches('i, s', h('b')), 'false for string')
 
     t.end()
   })
 
-  t.test('tag-names: `div`, `*`', function (t) {
+  t.test('tag-names: `div`, `*`', (t) => {
     t.ok(matches('*', h('')), 'true for `*`')
     t.ok(matches('b', h('b')), 'true if tag-names matches')
     t.notOk(matches('b', h('i')), 'false if tag-names don’t matches')
@@ -149,7 +153,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('id: `#id`', function (t) {
+  t.test('id: `#id`', (t) => {
     t.notOk(matches('#one', h('')), 'false if no id exists')
     t.ok(matches('#one', h('#one')), 'true for matchesing id’s')
     t.notOk(matches('#two', h('#one')), 'false for mismatchesed id’s')
@@ -165,7 +169,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('class: `.class`', function (t) {
+  t.test('class: `.class`', (t) => {
     t.notOk(matches('.one', h('')), 'false if no class-name exists')
     t.ok(matches('.one', h('.one')), 'true for matchesing class-name')
     t.ok(
@@ -180,7 +184,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('attributes, existence: `[attr]`', function (t) {
+  t.test('attributes, existence: `[attr]`', (t) => {
     t.ok(matches('[class]', h('.one')), 'true if attribute exists')
     t.notOk(matches('[for]', h('.one')), 'false if attribute does not exist')
     t.ok(
@@ -199,7 +203,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('attributes, equality: `[attr=value]`', function (t) {
+  t.test('attributes, equality: `[attr=value]`', (t) => {
     t.ok(
       matches('[id=one]', h('#one')),
       'true if attribute matches (string value)'
@@ -277,7 +281,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('attributes, begins: `[attr^=value]`', function (t) {
+  t.test('attributes, begins: `[attr^=value]`', (t) => {
     t.ok(
       matches('[id^=one]', h('#one')),
       'true if attribute matches (string value)'
@@ -351,7 +355,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('attributes, ends: `[attr$=value]`', function (t) {
+  t.test('attributes, ends: `[attr$=value]`', (t) => {
     t.ok(
       matches('[id$=one]', h('#one')),
       'true if attribute matches (string value)'
@@ -425,7 +429,7 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('attributes, contains: `[attr*=value]`', function (t) {
+  t.test('attributes, contains: `[attr*=value]`', (t) => {
     t.ok(
       matches('[id*=one]', h('#one')),
       'true if attribute matches (string value)'
@@ -502,7 +506,7 @@ test('select.matches()', function (t) {
 
   t.test(
     'attributes, contains in space-separated list: `[attr~=value]`',
-    function (t) {
+    (t) => {
       t.ok(
         matches('[id~=one]', h('#one')),
         'true if attribute matches (string value)'
@@ -600,7 +604,7 @@ test('select.matches()', function (t) {
     }
   )
 
-  t.test('attributes, starts or prefixes: `[attr|=value]`', function (t) {
+  t.test('attributes, starts or prefixes: `[attr|=value]`', (t) => {
     t.ok(
       matches('[id|=one]', h('#one')),
       'true if attribute matches (string value)'
@@ -698,9 +702,14 @@ test('select.matches()', function (t) {
     t.end()
   })
 
-  t.test('pseudo-classes', function (t) {
-    ;[':any', ':matches'].forEach(function (pseudo) {
-      t.test(pseudo, function (t) {
+  t.test('pseudo-classes', (t) => {
+    const anyMatchesPseudos = [':any', ':matches']
+    let index = -1
+
+    while (++index < anyMatchesPseudos.length) {
+      const pseudo = anyMatchesPseudos[index]
+
+      t.test(pseudo, (t) => {
         t.ok(
           matches(pseudo + '(a, [title], .class)', h('a')),
           'true if any matches (type)'
@@ -724,9 +733,9 @@ test('select.matches()', function (t) {
 
         t.end()
       })
-    })
+    }
 
-    t.test(':not()', function (t) {
+    t.test(':not()', (t) => {
       t.notOk(
         matches(':not(a, [title], .class)', h('a')),
         'false if any matches (type)'
@@ -751,12 +760,12 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':has', function (t) {
-      t.doesNotThrow(function () {
+    t.test(':has', (t) => {
+      t.doesNotThrow(() => {
         matches('section:not(:has())', h('p'))
       }, 'should not throw on empty selectors')
 
-      t.doesNotThrow(function () {
+      t.doesNotThrow(() => {
         matches('section:has()', h('p'))
       }, 'should not throw on empty selectors')
 
@@ -876,19 +885,24 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':any-link', function (t) {
-      ;['a', 'area', 'link'].forEach(function (name) {
+    t.test(':any-link', (t) => {
+      const links = ['a', 'area', 'link']
+      let index = -1
+
+      while (++index < links.length) {
+        const name = links[index]
+
         t.ok(
           matches(':any-link', h(name, {href: '#'})),
           'true if w/ href on ' + name
         )
         t.notOk(matches(':any-link', h(name)), 'false if w/o href on ' + name)
-      })
+      }
 
       t.end()
     })
 
-    t.test(':checked', function (t) {
+    t.test(':checked', (t) => {
       t.ok(
         matches(':checked', h('input', {type: 'checkbox', checked: true})),
         'true for checkbox inputs w/ `checked`'
@@ -936,8 +950,8 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':disabled', function (t) {
-      ;[
+    t.test(':disabled', (t) => {
+      const things = [
         'button',
         'input',
         'select',
@@ -946,7 +960,12 @@ test('select.matches()', function (t) {
         'option',
         'menuitem',
         'fieldset'
-      ].forEach(function (name) {
+      ]
+      let index = -1
+
+      while (++index < things.length) {
+        const name = things[index]
+
         t.ok(
           matches(':disabled', h(name, {disabled: true})),
           'true if w/ disabled on ' + name
@@ -955,13 +974,13 @@ test('select.matches()', function (t) {
           matches(':disabled', h(name)),
           'false if w/o disabled on ' + name
         )
-      })
+      }
 
       t.end()
     })
 
-    t.test(':enabled', function (t) {
-      ;[
+    t.test(':enabled', (t) => {
+      const things = [
         'button',
         'input',
         'select',
@@ -970,19 +989,27 @@ test('select.matches()', function (t) {
         'option',
         'menuitem',
         'fieldset'
-      ].forEach(function (name) {
+      ]
+      let index = -1
+
+      while (++index < things.length) {
+        const name = things[index]
         t.ok(matches(':enabled', h(name)), 'true if w/o disabled on ' + name)
         t.notOk(
           matches(':enabled', h(name, {disabled: true})),
           'false if w/ disabled on ' + name
         )
-      })
+      }
 
       t.end()
     })
 
-    t.test(':required', function (t) {
-      ;['input', 'textarea', 'select'].forEach(function (name) {
+    t.test(':required', (t) => {
+      const things = ['input', 'textarea', 'select']
+      let index = -1
+
+      while (++index < things.length) {
+        const name = things[index]
         t.ok(
           matches(':required', h(name, {required: true})),
           'true if w/ required on ' + name
@@ -991,24 +1018,29 @@ test('select.matches()', function (t) {
           matches(':required', h(name)),
           'false if w/o required on ' + name
         )
-      })
+      }
 
       t.end()
     })
 
-    t.test(':optional', function (t) {
-      ;['input', 'textarea', 'select'].forEach(function (name) {
+    t.test(':optional', (t) => {
+      const things = ['input', 'textarea', 'select']
+
+      let index = -1
+
+      while (++index < things.length) {
+        const name = things[index]
         t.ok(matches(':optional', h(name)), 'true if w/o required on ' + name)
         t.notOk(
           matches(':optional', h(name, {required: true})),
           'false if w/ required on ' + name
         )
-      })
+      }
 
       t.end()
     })
 
-    t.test(':empty', function (t) {
+    t.test(':empty', (t) => {
       t.ok(matches(':empty', h('')), 'true if w/o children')
       t.ok(
         matches(':empty', h('', u('comment', '?'))),
@@ -1024,7 +1056,7 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':blank', function (t) {
+    t.test(':blank', (t) => {
       t.ok(matches(':blank', h('')), 'true if w/o children')
       t.ok(
         matches(':blank', h('', u('comment', '?'))),
@@ -1040,7 +1072,7 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':lang()', function (t) {
+    t.test(':lang()', (t) => {
       t.ok(
         matches(':lang(de, en)', h('html', {xmlLang: 'en'})),
         'true if the element has an `xml:lang` attribute'
@@ -1101,10 +1133,10 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':dir()', function (t) {
-      var ltr = 'a'
-      var rtl = 'أ'
-      var neutral = '!'
+    t.test(':dir()', (t) => {
+      const ltr = 'a'
+      const rtl = 'أ'
+      const neutral = '!'
 
       t.ok(
         matches(':dir(ltr)', h('html', {dir: 'ltr'})),
@@ -1253,7 +1285,7 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':root', function (t) {
+    t.test(':root', (t) => {
       t.ok(matches(':root', h('html')), 'true if `<html>` in HTML space')
 
       t.notOk(matches(':root', h('div')), 'false if not `<html>` in HTML space')
@@ -1268,14 +1300,14 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':scope', function (t) {
+    t.test(':scope', (t) => {
       t.ok(matches(':scope', h('html')), 'always true for elements')
       t.ok(matches(':scope', h('p')), 'always true for elements')
       t.notOk(matches(':scope', u('text', '!')), 'always true for elements')
       t.end()
     })
 
-    t.test(':read-write', function (t) {
+    t.test(':read-write', (t) => {
       t.ok(matches(':read-write', h('input')), 'true on input')
       t.ok(matches(':read-write', h('input')), 'true on textarea')
       t.notOk(
@@ -1302,7 +1334,7 @@ test('select.matches()', function (t) {
       t.end()
     })
 
-    t.test(':read-only', function (t) {
+    t.test(':read-only', (t) => {
       t.notOk(matches(':read-only', h('input')), 'false on input')
       t.notOk(matches(':read-only', h('input')), 'false on textarea')
       t.ok(
diff --git a/test/select-all.js b/test/select-all.js
index 8aa0163..fb9c274 100644
--- a/test/select-all.js
+++ b/test/select-all.js
@@ -3,10 +3,10 @@ import {u} from 'unist-builder'
 import {h, s} from 'hastscript'
 import {selectAll} from '../index.js'
 
-test('select.selectAll()', function (t) {
-  t.test('invalid selectors', function (t) {
+test('select.selectAll()', (t) => {
+  t.test('invalid selectors', (t) => {
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         selectAll()
       },
@@ -15,7 +15,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         selectAll([], h(''))
       },
@@ -24,7 +24,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         selectAll('@supports (transform-origin: 5% 5%) {}', h(''))
       },
       /Error: Rule expected but "@" found./,
@@ -32,7 +32,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         selectAll('[foo%=bar]', h(''))
       },
       /Error: Expected "=" but "%" found./,
@@ -40,7 +40,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         selectAll(':active', h(''))
       },
       /Error: Unknown pseudo-selector `active`/,
@@ -48,7 +48,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         selectAll(':nth-foo(2n+1)', h(''))
       },
       /Error: Unknown pseudo-selector `nth-foo`/,
@@ -56,7 +56,7 @@ test('select.selectAll()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         selectAll('::before', h(''))
       },
       /Error: Unexpected pseudo-element or empty pseudo-class/,
@@ -66,7 +66,7 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('general', function (t) {
+  t.test('general', (t) => {
     t.deepEqual(
       selectAll('', h('')),
       [],
@@ -87,7 +87,7 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('descendant selector', function (t) {
+  t.test('descendant selector', (t) => {
     t.deepEqual(
       selectAll(
         'div',
@@ -135,7 +135,7 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('child selector', function (t) {
+  t.test('child selector', (t) => {
     t.deepEqual(
       selectAll(
         'main > article',
@@ -166,7 +166,7 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('next-sibling selector', function (t) {
+  t.test('next-sibling selector', (t) => {
     t.deepEqual(
       selectAll(
         'h1 + p',
@@ -220,7 +220,7 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('subsequent sibling selector', function (t) {
+  t.test('subsequent sibling selector', (t) => {
     t.deepEqual(
       selectAll(
         'h1 ~ p',
@@ -283,8 +283,8 @@ test('select.selectAll()', function (t) {
     t.end()
   })
 
-  t.test('parent-sensitive pseudo-selectors', function (t) {
-    t.test(':first-child', function (t) {
+  t.test('parent-sensitive pseudo-selectors', (t) => {
+    t.test(':first-child', (t) => {
       t.deepEqual(
         selectAll(
           ':first-child',
@@ -321,7 +321,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':last-child', function (t) {
+    t.test(':last-child', (t) => {
       t.deepEqual(
         selectAll(
           ':last-child',
@@ -358,7 +358,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':only-child', function (t) {
+    t.test(':only-child', (t) => {
       t.deepEqual(
         selectAll(
           ':only-child',
@@ -386,7 +386,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':nth-child', function (t) {
+    t.test(':nth-child', (t) => {
       t.deepEqual(
         selectAll(
           'li:nth-child(odd)',
@@ -454,7 +454,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':nth-last-child', function (t) {
+    t.test(':nth-last-child', (t) => {
       t.deepEqual(
         selectAll(
           'li:nth-last-child(odd)',
@@ -522,7 +522,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':nth-of-type', function (t) {
+    t.test(':nth-of-type', (t) => {
       t.deepEqual(
         selectAll(
           'dt:nth-of-type(odd)',
@@ -590,7 +590,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':nth-last-of-type', function (t) {
+    t.test(':nth-last-of-type', (t) => {
       t.deepEqual(
         selectAll(
           'dt:nth-last-of-type(odd)',
@@ -658,7 +658,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':first-of-type', function (t) {
+    t.test(':first-of-type', (t) => {
       t.deepEqual(
         selectAll(
           'dt:first-of-type',
@@ -684,7 +684,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':last-of-type', function (t) {
+    t.test(':last-of-type', (t) => {
       t.deepEqual(
         selectAll(
           'dt:last-of-type',
@@ -710,7 +710,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':only-of-type', function (t) {
+    t.test(':only-of-type', (t) => {
       t.deepEqual(
         selectAll(
           'dd:only-of-type',
@@ -750,7 +750,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':lang()', function (t) {
+    t.test(':lang()', (t) => {
       t.deepEqual(
         selectAll(
           'q:lang(en)',
@@ -789,9 +789,9 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':dir()', function (t) {
-      var ltr = 'a'
-      var rtl = 'أ'
+    t.test(':dir()', (t) => {
+      const ltr = 'a'
+      const rtl = 'أ'
 
       t.deepEqual(
         selectAll(
@@ -811,7 +811,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':read-write', function (t) {
+    t.test(':read-write', (t) => {
       t.deepEqual(
         selectAll(
           'p:read-write',
@@ -839,7 +839,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':read-only', function (t) {
+    t.test(':read-only', (t) => {
       t.deepEqual(
         selectAll(
           'p:read-only',
@@ -867,7 +867,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':root', function (t) {
+    t.test(':root', (t) => {
       t.deepEqual(
         selectAll(
           ':root',
@@ -949,7 +949,7 @@ test('select.selectAll()', function (t) {
       t.end()
     })
 
-    t.test(':scope', function (t) {
+    t.test(':scope', (t) => {
       t.deepEqual(
         selectAll(
           ':scope',
diff --git a/test/select.js b/test/select.js
index 448563b..48fca85 100644
--- a/test/select.js
+++ b/test/select.js
@@ -3,10 +3,10 @@ import {u} from 'unist-builder'
 import {h, s} from 'hastscript'
 import {select} from '../index.js'
 
-test('select.select()', function (t) {
-  t.test('invalid selectors', function (t) {
+test('select.select()', (t) => {
+  t.test('invalid selectors', (t) => {
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         select()
       },
@@ -15,7 +15,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         // @ts-ignore runtime.
         select([], h(''))
       },
@@ -24,7 +24,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         select('@supports (transform-origin: 5% 5%) {}', h(''))
       },
       /Error: Rule expected but "@" found./,
@@ -32,7 +32,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         select('[foo%=bar]', h(''))
       },
       /Error: Expected "=" but "%" found./,
@@ -40,7 +40,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         select(':active', h(''))
       },
       /Error: Unknown pseudo-selector `active`/,
@@ -48,7 +48,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         select(':nth-foo(2n+1)', h(''))
       },
       /Error: Unknown pseudo-selector `nth-foo`/,
@@ -56,7 +56,7 @@ test('select.select()', function (t) {
     )
 
     t.throws(
-      function () {
+      () => {
         select('::before', h(''))
       },
       /Error: Unexpected pseudo-element or empty pseudo-class/,
@@ -66,7 +66,7 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('general', function (t) {
+  t.test('general', (t) => {
     t.equal(select('', h('')), null, 'nothing for the empty string as selector')
     t.equal(select(' ', h('')), null, 'nothing for a white-space only selector')
     t.equal(select('*'), null, 'nothing if not given a node')
@@ -79,7 +79,7 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('descendant selector', function (t) {
+  t.test('descendant selector', (t) => {
     t.deepEqual(
       select(
         'div',
@@ -116,7 +116,7 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('child selector', function (t) {
+  t.test('child selector', (t) => {
     t.deepEqual(
       select(
         'main > article',
@@ -147,7 +147,7 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('next-sibling selector', function (t) {
+  t.test('next-sibling selector', (t) => {
     t.deepEqual(
       select(
         'h1 + p',
@@ -201,7 +201,7 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('subsequent sibling selector', function (t) {
+  t.test('subsequent sibling selector', (t) => {
     t.deepEqual(
       select(
         'h1 ~ p',
@@ -264,8 +264,8 @@ test('select.select()', function (t) {
     t.end()
   })
 
-  t.test('parent-sensitive pseudo-selectors', function (t) {
-    t.test(':first-child', function (t) {
+  t.test('parent-sensitive pseudo-selectors', (t) => {
+    t.test(':first-child', (t) => {
       t.deepEqual(
         select(
           ':first-child',
@@ -293,7 +293,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':last-child', function (t) {
+    t.test(':last-child', (t) => {
       t.deepEqual(
         select(
           ':last-child',
@@ -321,7 +321,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':only-child', function (t) {
+    t.test(':only-child', (t) => {
       t.deepEqual(
         select(
           ':only-child',
@@ -349,7 +349,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':nth-child', function (t) {
+    t.test(':nth-child', (t) => {
       t.deepEqual(
         select(
           'li:nth-child(odd)',
@@ -417,7 +417,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':nth-last-child', function (t) {
+    t.test(':nth-last-child', (t) => {
       t.deepEqual(
         select(
           'li:nth-last-child(odd)',
@@ -485,7 +485,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':nth-of-type', function (t) {
+    t.test(':nth-of-type', (t) => {
       t.deepEqual(
         select(
           'dt:nth-of-type(odd)',
@@ -553,7 +553,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':nth-last-of-type', function (t) {
+    t.test(':nth-last-of-type', (t) => {
       t.deepEqual(
         select(
           'dt:nth-last-of-type(odd)',
@@ -621,7 +621,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':first-of-type', function (t) {
+    t.test(':first-of-type', (t) => {
       t.deepEqual(
         select(
           'dt:first-of-type',
@@ -647,7 +647,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':last-of-type', function (t) {
+    t.test(':last-of-type', (t) => {
       t.deepEqual(
         select(
           'dt:last-of-type',
@@ -673,7 +673,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':only-of-type', function (t) {
+    t.test(':only-of-type', (t) => {
       t.deepEqual(
         select(
           'dd:only-of-type',
@@ -713,7 +713,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':lang()', function (t) {
+    t.test(':lang()', (t) => {
       t.deepEqual(
         select(
           'q:lang(en)',
@@ -732,10 +732,10 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':dir()', function (t) {
-      var ltr = 'a'
-      var rtl = 'أ'
-      var neutral = '!'
+    t.test(':dir()', (t) => {
+      const ltr = 'a'
+      const rtl = 'أ'
+      const neutral = '!'
 
       t.deepEqual(
         select(
@@ -755,7 +755,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':read-write', function (t) {
+    t.test(':read-write', (t) => {
       t.deepEqual(
         select(
           'p:read-write',
@@ -783,7 +783,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':read-only', function (t) {
+    t.test(':read-only', (t) => {
       t.deepEqual(
         select(
           'p:read-only',
@@ -811,7 +811,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':root', function (t) {
+    t.test(':root', (t) => {
       t.deepEqual(
         select(
           ':root',
@@ -887,7 +887,7 @@ test('select.select()', function (t) {
       t.end()
     })
 
-    t.test(':scope', function (t) {
+    t.test(':scope', (t) => {
       t.deepEqual(
         select(
           ':scope',
diff --git a/test/svg.js b/test/svg.js
index ac0bd8c..98bbf10 100644
--- a/test/svg.js
+++ b/test/svg.js
@@ -3,7 +3,7 @@ import {u} from 'unist-builder'
 import {h, s} from 'hastscript'
 import {select, selectAll} from '../index.js'
 
-test('svg', function (t) {
+test('svg', (t) => {
   t.deepEqual(
     select(
       '[writing-mode]',

From bd62f7db824120c6e0ee28f31028b2d16414366e Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Fri, 23 Jul 2021 12:56:24 +0200
Subject: [PATCH 04/10] Add `strict` to `tsconfig.json`

---
 lib/any.js         | 16 ++++----
 lib/attribute.js   | 66 +++++++++++++++++++++-----------
 lib/class-name.js  |  8 ++--
 lib/enter-state.js | 31 ++++++++-------
 lib/id.js          |  2 +-
 lib/nest.js        | 33 ++++++++++++++--
 lib/parse.js       |  9 +++--
 lib/pseudo.js      | 95 ++++++++++++++++++++++++++++++++++++----------
 lib/test.js        | 13 ++++---
 lib/util.js        |  2 +-
 test/matches.js    |  4 +-
 test/select-all.js |  4 +-
 test/select.js     |  4 +-
 tsconfig.json      |  3 +-
 14 files changed, 202 insertions(+), 88 deletions(-)

diff --git a/lib/any.js b/lib/any.js
index f986db9..902b44a 100644
--- a/lib/any.js
+++ b/lib/any.js
@@ -16,19 +16,21 @@ import {pseudo} from './pseudo.js'
 import {test} from './test.js'
 
 const type = zwitch('type', {
+  // @ts-expect-error: hush.
   unknown: unknownType,
   invalid: invalidType,
+  // @ts-expect-error: hush.
   handlers: {selectors, ruleSet, rule}
 })
 
 /**
  * @param {Selectors|RuleSet|Rule} query
- * @param {HastNode} node
+ * @param {HastNode|undefined} node
  * @param {SelectState} state
  * @returns {Array.<Element>}
  */
 export function any(query, node, state) {
-  // @ts-ignore zwitch types are off.
+  // @ts-expect-error zwitch types are off.
   return query && node ? type(query, node, state) : []
 }
 
@@ -79,10 +81,10 @@ function rule(query, tree, state) {
     null,
     configure(query, {
       schema: state.space === 'svg' ? svg : html,
-      language: null,
+      language: undefined,
       direction: 'ltr',
       editableOrEditingHost: false,
-      // @ts-ignore assume elements.
+      // @ts-expect-error assume elements.
       scopeElements: tree.type === 'root' ? tree.children : [tree],
       iterator,
       one: state.one,
@@ -100,7 +102,7 @@ function rule(query, tree, state) {
       if (query.rule) {
         nest(query.rule, node, index, parent, configure(query.rule, state))
       } else {
-        // @ts-ignore `test` also asserts `node is Element`
+        // @ts-expect-error `test` also asserts `node is Element`
         collector.collect(node)
         state.found = true
       }
@@ -147,12 +149,12 @@ function invalidType() {
 
 class Collector {
   /**
-   * @param {boolean} one
+   * @param {boolean|undefined} [one]
    */
   constructor(one) {
     /** @type {Array.<Element>} */
     this.result = []
-    /** @type {boolean} */
+    /** @type {boolean|undefined} */
     this.one = one
     /** @type {boolean} */
     this.found = false
diff --git a/lib/attribute.js b/lib/attribute.js
index df596e9..6906628 100644
--- a/lib/attribute.js
+++ b/lib/attribute.js
@@ -14,14 +14,22 @@ import {stringify as spaces} from 'space-separated-tokens'
 import {zwitch} from 'zwitch'
 
 const handle = zwitch('operator', {
+  // @ts-expect-error: hush.
   unknown: unknownOperator,
+  // @ts-expect-error: hush.
   invalid: exists,
   handlers: {
+    // @ts-expect-error: hush.
     '=': exact,
+    // @ts-expect-error: hush.
     '~=': spaceSeparatedList,
+    // @ts-expect-error: hush.
     '|=': exactOrPrefix,
+    // @ts-expect-error: hush.
     '^=': begins,
+    // @ts-expect-error: hush.
     '$=': ends,
+    // @ts-expect-error: hush.
     '*=': contains
   }
 })
@@ -37,7 +45,9 @@ export function attribute(query, element, schema) {
   let index = -1
 
   while (++index < attrs.length) {
-    if (!handle(attrs[index], element, find(schema, attrs[index].name))) return
+    if (!handle(attrs[index], element, find(schema, attrs[index].name))) {
+      return false
+    }
   }
 
   return true
@@ -64,9 +74,10 @@ function exists(_, element, info) {
  * @returns {boolean}
  */
 function exact(query, element, info) {
-  return (
+  return Boolean(
     hasProperty(element, info.property) &&
-    normalizeValue(element.properties[info.property], info) === query.value
+      element.properties &&
+      normalizeValue(element.properties[info.property], info) === query.value
   )
 }
 
@@ -79,7 +90,7 @@ function exact(query, element, info) {
  * @returns {boolean}
  */
 function spaceSeparatedList(query, element, info) {
-  const value = element.properties[info.property]
+  const value = element.properties && element.properties[info.property]
 
   return (
     // If this is a comma-separated list, and the query is contained in it, return
@@ -87,6 +98,7 @@ function spaceSeparatedList(query, element, info) {
     (!info.commaSeparated &&
       value &&
       typeof value === 'object' &&
+      query.value &&
       value.includes(query.value)) ||
     // For all other values (including comma-separated lists), return whether this
     // is an exact match.
@@ -104,13 +116,17 @@ function spaceSeparatedList(query, element, info) {
  * @returns {boolean}
  */
 function exactOrPrefix(query, element, info) {
-  const value = normalizeValue(element.properties[info.property], info)
+  const value = normalizeValue(
+    element.properties && element.properties[info.property],
+    info
+  )
 
-  return (
+  return Boolean(
     hasProperty(element, info.property) &&
-    (value === query.value ||
-      (value.slice(0, query.value.length) === query.value &&
-        value.charAt(query.value.length) === '-'))
+      query.value &&
+      (value === query.value ||
+        (value.slice(0, query.value.length) === query.value &&
+          value.charAt(query.value.length) === '-'))
   )
 }
 
@@ -123,12 +139,14 @@ function exactOrPrefix(query, element, info) {
  * @returns {boolean}
  */
 function begins(query, element, info) {
-  return (
+  return Boolean(
     hasProperty(element, info.property) &&
-    normalizeValue(element.properties[info.property], info).slice(
-      0,
-      query.value.length
-    ) === query.value
+      element.properties &&
+      query.value &&
+      normalizeValue(element.properties[info.property], info).slice(
+        0,
+        query.value.length
+      ) === query.value
   )
 }
 
@@ -141,11 +159,13 @@ function begins(query, element, info) {
  * @returns {boolean}
  */
 function ends(query, element, info) {
-  return (
+  return Boolean(
     hasProperty(element, info.property) &&
-    normalizeValue(element.properties[info.property], info).slice(
-      -query.value.length
-    ) === query.value
+      element.properties &&
+      query.value &&
+      normalizeValue(element.properties[info.property], info).slice(
+        -query.value.length
+      ) === query.value
   )
 }
 
@@ -158,11 +178,13 @@ function ends(query, element, info) {
  * @returns {boolean}
  */
 function contains(query, element, info) {
-  return (
+  return Boolean(
     hasProperty(element, info.property) &&
-    normalizeValue(element.properties[info.property], info).includes(
-      query.value
-    )
+      element.properties &&
+      query.value &&
+      normalizeValue(element.properties[info.property], info).includes(
+        query.value
+      )
   )
 }
 
diff --git a/lib/class-name.js b/lib/class-name.js
index c65589d..988af2c 100644
--- a/lib/class-name.js
+++ b/lib/class-name.js
@@ -10,12 +10,14 @@
  */
 export function className(query, element) {
   /** @type {Array.<string>} */
-  // @ts-ignore Assume array.
+  // @ts-expect-error Assume array.
   const value = element.properties.className || []
   let index = -1
 
-  while (++index < query.classNames.length) {
-    if (!value.includes(query.classNames[index])) return
+  if (query.classNames) {
+    while (++index < query.classNames.length) {
+      if (!value.includes(query.classNames[index])) return false
+    }
   }
 
   return true
diff --git a/lib/enter-state.js b/lib/enter-state.js
index 8c023dd..6464e1f 100644
--- a/lib/enter-state.js
+++ b/lib/enter-state.js
@@ -8,6 +8,7 @@
 
 import {direction} from 'direction'
 import {isElement} from 'hast-util-is-element'
+// @ts-expect-error: to do type.
 import toString from 'hast-util-to-string'
 import {svg} from 'property-information'
 import {visit, EXIT, SKIP} from 'unist-util-visit'
@@ -24,15 +25,13 @@ export function enterState(state, node) {
   const language = state.language
   const currentDirection = state.direction
   const editableOrEditingHost = state.editableOrEditingHost
-  /** @type {Direction|null} */
+  /** @type {Direction|undefined} */
   let dirInferred
-  /** @type {boolean} */
+  /** @type {boolean|undefined} */
   let found
 
-  if (element(node)) {
-    // @ts-ignore Assume string.
+  if (element(node) && node.properties) {
     const lang = node.properties.xmlLang || node.properties.lang
-    // @ts-ignore Assume string.
     const type = node.properties.type || 'text'
     const dir = dirProperty(node)
 
@@ -41,7 +40,7 @@ export function enterState(state, node) {
       found = true
     }
 
-    if (schema.space === 'html') {
+    if (schema && schema.space === 'html') {
       if (node.properties.contentEditable === 'true') {
         state.editableOrEditingHost = true
         found = true
@@ -78,13 +77,14 @@ export function enterState(state, node) {
             type === 'text')
         ) {
           // Check value of `<input>`.
-          // @ts-ignore something is `never` in types but this is needed.
+          // @ts-expect-error something is `never` in types but this is needed.
           dirInferred = node.properties.value
-            ? // @ts-ignore Assume string
+            ? // @ts-expect-error Assume string
               dirBidi(node.properties.value)
             : 'ltr'
         } else {
           // Check text nodes in `node`.
+          // @ts-expect-error: fine.
           visit(node, inferDirectionality)
         }
       }
@@ -129,23 +129,26 @@ export function enterState(state, node) {
 
 /**
  * @param {string} value
- * @returns {Direction}
+ * @returns {Direction|undefined}
  */
 function dirBidi(value) {
   const result = direction(value)
-  return result === 'neutral' ? null : result
+  return result === 'neutral' ? undefined : result
 }
 
 /**
  * @param {ElementChild} node
- * @returns {Direction}
+ * @returns {Direction|undefined}
  */
 function dirProperty(node) {
   const value =
-    element(node) && typeof node.properties.dir === 'string'
+    element(node) && node.properties && typeof node.properties.dir === 'string'
       ? node.properties.dir.toLowerCase()
-      : null
-  return value === 'auto' || value === 'ltr' || value === 'rtl' ? value : null
+      : undefined
+
+  return value === 'auto' || value === 'ltr' || value === 'rtl'
+    ? value
+    : undefined
 }
 
 function noop() {}
diff --git a/lib/id.js b/lib/id.js
index 1b14632..0942da1 100644
--- a/lib/id.js
+++ b/lib/id.js
@@ -9,5 +9,5 @@
  * @returns {boolean}
  */
 export function id(query, element) {
-  return element.properties.id === query.id
+  return Boolean(element.properties && element.properties.id === query.id)
 }
diff --git a/lib/nest.js b/lib/nest.js
index a749e29..9831cdb 100644
--- a/lib/nest.js
+++ b/lib/nest.js
@@ -15,19 +15,25 @@ import {parent, element} from './util.js'
 const own = {}.hasOwnProperty
 
 const handle = zwitch('nestingOperator', {
+  // @ts-expect-error: hush.
   unknown: unknownNesting,
+  // @ts-expect-error: hush.
   invalid: topScan, // `undefined` is the top query selector.
   handlers: {
+    // @ts-expect-error: hush.
     null: descendant, // `null` is the descendant combinator.
+    // @ts-expect-error: hush.
     '>': child,
+    // @ts-expect-error: hush.
     '+': adjacentSibling,
+    // @ts-expect-error: hush.
     '~': generalSibling
   }
 })
 
 /** @type {Handler} */
 export function nest(query, node, index, parent, state) {
-  return handle(query, node, index, parent, state)
+  handle(query, node, index, parent, state)
 }
 
 // Shouldn’t be called, parser gives correct data.
@@ -43,10 +49,16 @@ function unknownNesting(query) {
 function topScan(query, node, index, parent, state) {
   // Shouldn’t happen.
   /* c8 ignore next 3 */
-  if (parent) {
+  if (parent || index === null) {
     throw new Error('topScan is supposed to be called from the root node')
   }
 
+  // Shouldn’t happen.
+  /* c8 ignore next 3 */
+  if (!state.iterator) {
+    throw new Error('Expected `iterator`')
+  }
+
   state.iterator(query, node, index, parent, state)
   if (!state.shallow) descendant(query, node, index, parent, state)
 }
@@ -60,6 +72,12 @@ function descendant(query, node, index, parent, state) {
 
   /** @type {SelectIterator} */
   function iterator(query, node, index, parent, state) {
+    // Shouldn’t happen.
+    /* c8 ignore next 3 */
+    if (!previous) {
+      throw new Error('Expected `iterator`')
+    }
+
     state.iterator = previous
     previous(query, node, index, parent, state)
     state.iterator = iterator
@@ -81,7 +99,7 @@ function child(query, node, _1, _2, state) {
 function adjacentSibling(query, _, index, parent, state) {
   // Shouldn’t happen.
   /* c8 ignore next */
-  if (!parent) return
+  if (!parent || index === null) return
   indexedSearch(query, parent, state, index + 1, true)
 }
 
@@ -89,7 +107,7 @@ function adjacentSibling(query, _, index, parent, state) {
 function generalSibling(query, _, index, parent, state) {
   // Shouldn’t happen.
   /* c8 ignore next */
-  if (!parent) return
+  if (!parent || index === null) return
   indexedSearch(query, parent, state, index + 1)
 }
 
@@ -183,6 +201,13 @@ function indexedSearch(query, parent, state, from, firstElementOnly) {
    */
   function add(node, childIndex) {
     const exit = enterState(state, node)
+
+    // Shouldn’t happen.
+    /* c8 ignore next 3 */
+    if (!state.iterator) {
+      throw new Error('Expected `iterator`')
+    }
+
     state.iterator(query, node, childIndex, parent, state)
     exit()
   }
diff --git a/lib/parse.js b/lib/parse.js
index 60f643a..21bac70 100644
--- a/lib/parse.js
+++ b/lib/parse.js
@@ -12,7 +12,7 @@ import fauxEsmNthCheck from 'nth-check'
 import {zwitch} from 'zwitch'
 
 /** @type {import('nth-check').default} */
-// @ts-ignore
+// @ts-expect-error
 const nthCheck = fauxEsmNthCheck.default
 
 const nth = new Set([
@@ -24,6 +24,7 @@ const nth = new Set([
 
 const parser = new CssSelectorParser()
 
+// @ts-expect-error: hush.
 const compile = zwitch('type', {handlers: {selectors, ruleSet, rule}})
 
 parser.registerAttrEqualityMods('~', '|', '^', '$', '*')
@@ -39,7 +40,7 @@ export function parse(selector) {
     throw new TypeError('Expected `string` as selector, not `' + selector + '`')
   }
 
-  // @ts-ignore types are wrong.
+  // @ts-expect-error types are wrong.
   return compile(parser.parse(selector))
 }
 
@@ -77,9 +78,9 @@ function rule(query) {
     const pseudo = pseudos[index]
 
     if (nth.has(pseudo.name)) {
-      // @ts-ignore Patch a non-primitive type.
+      // @ts-expect-error Patch a non-primitive type.
       pseudo.value = nthCheck(pseudo.value)
-      // @ts-ignore Patch a non-primitive type.
+      // @ts-expect-error Patch a non-primitive type.
       pseudo.valueType = 'function'
     }
   }
diff --git a/lib/pseudo.js b/lib/pseudo.js
index a31ad07..a54ab0e 100644
--- a/lib/pseudo.js
+++ b/lib/pseudo.js
@@ -20,36 +20,65 @@ import {zwitch} from 'zwitch'
 import {any} from './any.js'
 
 const handle = zwitch('name', {
+  // @ts-expect-error: hush.
   unknown: unknownPseudo,
   invalid: invalidPseudo,
   handlers: {
+    // @ts-expect-error: hush.
     any: matches,
+    // @ts-expect-error: hush.
     'any-link': anyLink,
+    // @ts-expect-error: hush.
     blank,
+    // @ts-expect-error: hush.
     checked,
+    // @ts-expect-error: hush.
     dir,
+    // @ts-expect-error: hush.
     disabled,
+    // @ts-expect-error: hush.
     empty,
+    // @ts-expect-error: hush.
     enabled,
+    // @ts-expect-error: hush.
     'first-child': firstChild,
+    // @ts-expect-error: hush.
     'first-of-type': firstOfType,
+    // @ts-expect-error: hush.
     has,
+    // @ts-expect-error: hush.
     lang,
+    // @ts-expect-error: hush.
     'last-child': lastChild,
+    // @ts-expect-error: hush.
     'last-of-type': lastOfType,
+    // @ts-expect-error: hush.
     matches,
+    // @ts-expect-error: hush.
     not,
+    // @ts-expect-error: hush.
     'nth-child': nthChild,
+    // @ts-expect-error: hush.
     'nth-last-child': nthLastChild,
+    // @ts-expect-error: hush.
     'nth-of-type': nthOfType,
+    // @ts-expect-error: hush.
     'nth-last-of-type': nthLastOfType,
+    // @ts-expect-error: hush.
     'only-child': onlyChild,
+    // @ts-expect-error: hush.
     'only-of-type': onlyOfType,
+    // @ts-expect-error: hush.
     optional,
+    // @ts-expect-error: hush.
     'read-only': readOnly,
+    // @ts-expect-error: hush.
     'read-write': readWrite,
+    // @ts-expect-error: hush.
     required,
+    // @ts-expect-error: hush.
     root,
+    // @ts-expect-error: hush.
     scope
   }
 })
@@ -80,7 +109,7 @@ export function pseudo(query, element, index, parent, state) {
   let offset = -1
 
   while (++offset < pseudos.length) {
-    if (!handle(pseudos[offset], element, index, parent, state)) return
+    if (!handle(pseudos[offset], element, index, parent, state)) return false
   }
 
   return true
@@ -139,14 +168,19 @@ function anyLink(_, element) {
  */
 function checked(_, element) {
   if (isElement(element, ['input', 'menuitem'])) {
-    return (
-      (element.properties.type === 'checkbox' ||
-        element.properties.type === 'radio') &&
-      hasProperty(element, 'checked')
+    return Boolean(
+      element.properties &&
+        (element.properties.type === 'checkbox' ||
+          element.properties.type === 'radio') &&
+        hasProperty(element, 'checked')
     )
   }
 
-  if (isElement(element, 'option')) return hasProperty(element, 'selected')
+  if (isElement(element, 'option')) {
+    return hasProperty(element, 'selected')
+  }
+
+  return false
 }
 
 /**
@@ -222,7 +256,7 @@ function optional(query, element) {
 function readWrite(_, element, _1, _2, state) {
   return isElement(element, ['input', 'textarea'])
     ? !hasProperty(element, 'readOnly') && !hasProperty(element, 'disabled')
-    : state.editableOrEditingHost
+    : Boolean(state.editableOrEditingHost)
 }
 
 /**
@@ -246,10 +280,11 @@ function readOnly(query, element, index, parent, state) {
  * @returns {boolean}
  */
 function root(_, element, _1, parent, state) {
-  return (
+  return Boolean(
     (!parent || parent.type === 'root') &&
-    (state.schema.space === 'html' || state.schema.space === 'svg') &&
-    isElement(element, ['html', 'svg'])
+      state.schema &&
+      (state.schema.space === 'html' || state.schema.space === 'svg') &&
+      isElement(element, ['html', 'svg'])
   )
 }
 
@@ -262,7 +297,11 @@ function root(_, element, _1, parent, state) {
  * @returns {boolean}
  */
 function scope(_, element, _1, _2, state) {
-  return isElement(element) && state.scopeElements.includes(element)
+  return Boolean(
+    isElement(element) &&
+      state.scopeElements &&
+      state.scopeElements.includes(element)
+  )
 }
 
 /**
@@ -327,7 +366,7 @@ function lang(query, _1, _2, _3, state) {
     state.language !== '' &&
     state.language !== undefined &&
     state.language !== null &&
-    // @ts-ignore never `selectors`.
+    // @ts-expect-error never `selectors`.
     extendedFilter(state.language, commas(query.value)).length > 0
   )
 }
@@ -342,7 +381,9 @@ function lang(query, _1, _2, _3, state) {
  */
 function lastChild(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return state.elementIndex === state.elementCount - 1
+  return Boolean(
+    state.elementCount && state.elementIndex === state.elementCount - 1
+  )
 }
 
 /**
@@ -368,7 +409,9 @@ function onlyChild(query, _1, _2, _3, state) {
  */
 function nthChild(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return query.value(state.elementIndex)
+  return (
+    typeof state.elementIndex === 'number' && query.value(state.elementIndex)
+  )
 }
 
 /**
@@ -381,7 +424,11 @@ function nthChild(query, _1, _2, _3, state) {
  */
 function nthLastChild(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return query.value(state.elementCount - state.elementIndex - 1)
+  return Boolean(
+    typeof state.elementCount === 'number' &&
+      typeof state.elementIndex === 'number' &&
+      query.value(state.elementCount - state.elementIndex - 1)
+  )
 }
 
 /**
@@ -394,7 +441,7 @@ function nthLastChild(query, _1, _2, _3, state) {
  */
 function nthOfType(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return query.value(state.typeIndex)
+  return typeof state.typeIndex === 'number' && query.value(state.typeIndex)
 }
 
 /**
@@ -407,7 +454,11 @@ function nthOfType(query, _1, _2, _3, state) {
  */
 function nthLastOfType(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return query.value(state.typeCount - 1 - state.typeIndex)
+  return (
+    typeof state.typeCount === 'number' &&
+    typeof state.typeIndex === 'number' &&
+    query.value(state.typeCount - 1 - state.typeIndex)
+  )
 }
 
 /**
@@ -433,7 +484,11 @@ function firstOfType(query, _1, _2, _3, state) {
  */
 function lastOfType(query, _1, _2, _3, state) {
   assertDeep(state, query)
-  return state.typeIndex === state.typeCount - 1
+  return (
+    typeof state.typeIndex === 'number' &&
+    typeof state.typeCount === 'number' &&
+    state.typeIndex === state.typeCount - 1
+  )
 }
 
 /**
@@ -461,6 +516,8 @@ function someChildren(element, check) {
   while (++index < children.length) {
     if (check(children[index])) return true
   }
+
+  return false
 }
 
 // Shouldn’t be called, parser gives correct data.
@@ -538,7 +595,7 @@ function appendScope(value) {
     ) {
       selector.selectors[index] = {
         type: 'ruleSet',
-        // @ts-ignore pseudos are fine w/ just a name!
+        // @ts-expect-error pseudos are fine w/ just a name!
         rule: {type: 'rule', rule, pseudos: [{name: 'scope'}]}
       }
     }
diff --git a/lib/test.js b/lib/test.js
index b447c6e..b628c2d 100644
--- a/lib/test.js
+++ b/lib/test.js
@@ -23,12 +23,13 @@ import {element} from './util.js'
  * @returns {boolean}
  */
 export function test(query, node, index, parent, state) {
-  return (
+  return Boolean(
     element(node) &&
-    (!query.tagName || name(query, node)) &&
-    (!query.classNames || className(query, node)) &&
-    (!query.id || id(query, node)) &&
-    (!query.attrs || attribute(query, node, state.schema)) &&
-    (!query.pseudos || pseudo(query, node, index, parent, state))
+      state.schema &&
+      (!query.tagName || name(query, node)) &&
+      (!query.classNames || className(query, node)) &&
+      (!query.id || id(query, node)) &&
+      (!query.attrs || attribute(query, node, state.schema)) &&
+      (!query.pseudos || pseudo(query, node, index, parent, state))
   )
 }
diff --git a/lib/util.js b/lib/util.js
index aaa4583..490600e 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -17,5 +17,5 @@ export function parent(node) {
 }
 
 /** @type {IsElement} */
-// @ts-ignore it works.
+// @ts-expect-error it works.
 export const element = convertElement()
diff --git a/test/matches.js b/test/matches.js
index 6fa32a0..68e781e 100644
--- a/test/matches.js
+++ b/test/matches.js
@@ -7,7 +7,7 @@ test('select.matches()', (t) => {
   t.test('invalid selector', (t) => {
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         matches()
       },
       /Error: Expected `string` as selector, not `undefined`/,
@@ -16,7 +16,7 @@ test('select.matches()', (t) => {
 
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         matches([], h(''))
       },
       /Error: Expected `string` as selector, not ``/,
diff --git a/test/select-all.js b/test/select-all.js
index fb9c274..5125b90 100644
--- a/test/select-all.js
+++ b/test/select-all.js
@@ -7,7 +7,7 @@ test('select.selectAll()', (t) => {
   t.test('invalid selectors', (t) => {
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         selectAll()
       },
       /Error: Expected `string` as selector, not `undefined`/,
@@ -16,7 +16,7 @@ test('select.selectAll()', (t) => {
 
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         selectAll([], h(''))
       },
       /Error: Expected `string` as selector, not ``/,
diff --git a/test/select.js b/test/select.js
index 48fca85..6fc3efb 100644
--- a/test/select.js
+++ b/test/select.js
@@ -7,7 +7,7 @@ test('select.select()', (t) => {
   t.test('invalid selectors', (t) => {
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         select()
       },
       /Error: Expected `string` as selector, not `undefined`/,
@@ -16,7 +16,7 @@ test('select.select()', (t) => {
 
     t.throws(
       () => {
-        // @ts-ignore runtime.
+        // @ts-expect-error runtime.
         select([], h(''))
       },
       /Error: Expected `string` as selector, not ``/,
diff --git a/tsconfig.json b/tsconfig.json
index 2b103bd..f437d29 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -10,6 +10,7 @@
     "declaration": true,
     "emitDeclarationOnly": true,
     "allowSyntheticDefaultImports": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "strict": true
   }
 }

From b160bbab166f73920fbb0acec6579c8fc187f50e Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Fri, 23 Jul 2021 12:56:58 +0200
Subject: [PATCH 05/10] Update `xo`

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index f91a948..0d1af03 100644
--- a/package.json
+++ b/package.json
@@ -67,7 +67,7 @@
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
     "unist-builder": "^3.0.0",
-    "xo": "^0.39.0"
+    "xo": "^0.42.0"
   },
   "scripts": {
     "prepack": "npm run build && npm run format",

From 1f2630ced5ebe8a6ef55943c6e56ec4f0056547b Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Fri, 30 Jul 2021 11:09:34 +0200
Subject: [PATCH 06/10] Update `unist-util-visit`

---
 lib/enter-state.js | 1 -
 package.json       | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/lib/enter-state.js b/lib/enter-state.js
index 6464e1f..42361f9 100644
--- a/lib/enter-state.js
+++ b/lib/enter-state.js
@@ -84,7 +84,6 @@ export function enterState(state, node) {
             : 'ltr'
         } else {
           // Check text nodes in `node`.
-          // @ts-expect-error: fine.
           visit(node, inferDirectionality)
         }
       }
diff --git a/package.json b/package.json
index 0d1af03..068f6f9 100644
--- a/package.json
+++ b/package.json
@@ -52,7 +52,7 @@
     "nth-check": "^2.0.0",
     "property-information": "^6.0.0",
     "space-separated-tokens": "^2.0.0",
-    "unist-util-visit": "^3.0.0",
+    "unist-util-visit": "^4.0.0",
     "zwitch": "^2.0.0"
   },
   "devDependencies": {

From 1ee84f3c8a673dac8eec79b7e1f24cb8a3e93417 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Sun, 1 Aug 2021 21:12:04 +0200
Subject: [PATCH 07/10] Update `hast-util-to-string`

---
 lib/enter-state.js | 3 +--
 package.json       | 2 +-
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/lib/enter-state.js b/lib/enter-state.js
index 42361f9..0cd65cf 100644
--- a/lib/enter-state.js
+++ b/lib/enter-state.js
@@ -8,8 +8,7 @@
 
 import {direction} from 'direction'
 import {isElement} from 'hast-util-is-element'
-// @ts-expect-error: to do type.
-import toString from 'hast-util-to-string'
+import {toString} from 'hast-util-to-string'
 import {svg} from 'property-information'
 import {visit, EXIT, SKIP} from 'unist-util-visit'
 import {element} from './util.js'
diff --git a/package.json b/package.json
index 068f6f9..cae2326 100644
--- a/package.json
+++ b/package.json
@@ -46,7 +46,7 @@
     "direction": "^2.0.0",
     "hast-util-has-property": "^2.0.0",
     "hast-util-is-element": "^2.0.0",
-    "hast-util-to-string": "^1.0.0",
+    "hast-util-to-string": "^2.0.0",
     "hast-util-whitespace": "^2.0.0",
     "not": "^0.1.0",
     "nth-check": "^2.0.0",

From 724bb40e68e466b42650012f2a1851706c4da566 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Mon, 30 Aug 2021 20:33:44 +0200
Subject: [PATCH 08/10] Fix exception on selector list in `select`

---
 lib/any.js     | 2 +-
 test/select.js | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lib/any.js b/lib/any.js
index 902b44a..a0c15aa 100644
--- a/lib/any.js
+++ b/lib/any.js
@@ -182,7 +182,7 @@ class Collector {
     if (this.one) {
       // Shouldn’t happen, safeguards performance problems.
       /* c8 ignore next */
-      if (this.found) throw new Error('Cannot collect multiple nodes')
+      if (this.found) return
       this.found = true
     }
 
diff --git a/test/select.js b/test/select.js
index 6fc3efb..bb9edd6 100644
--- a/test/select.js
+++ b/test/select.js
@@ -76,6 +76,12 @@ test('select.select()', (t) => {
       'nothing if not given an element'
     )
 
+    t.deepEqual(
+      select('h1, h2', h('main', [h('h1', 'Alpha'), h('h2', 'Bravo')])),
+      h('h1', 'Alpha'),
+      'should select one of several elements'
+    )
+
     t.end()
   })
 

From 4ad03adc9f99c4c578e0188f21c3d296dcf02950 Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Mon, 30 Aug 2021 20:35:10 +0200
Subject: [PATCH 09/10] Update dev-dependencies

---
 package.json | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/package.json b/package.json
index cae2326..b06ac51 100644
--- a/package.json
+++ b/package.json
@@ -60,14 +60,14 @@
     "c8": "^7.0.0",
     "hastscript": "^7.0.0",
     "prettier": "^2.0.0",
-    "remark-cli": "^9.0.0",
-    "remark-preset-wooorm": "^8.0.0",
+    "remark-cli": "^10.0.0",
+    "remark-preset-wooorm": "^9.0.0",
     "rimraf": "^3.0.0",
     "tape": "^5.0.0",
     "type-coverage": "^2.0.0",
     "typescript": "^4.0.0",
     "unist-builder": "^3.0.0",
-    "xo": "^0.42.0"
+    "xo": "^0.44.0"
   },
   "scripts": {
     "prepack": "npm run build && npm run format",

From aeedcaef7b7cf3872f7dd578cfd498527f3fc0ee Mon Sep 17 00:00:00 2001
From: Titus Wormer <tituswormer@gmail.com>
Date: Mon, 30 Aug 2021 20:35:24 +0200
Subject: [PATCH 10/10] 5.0.1

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index b06ac51..d335ca6 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "hast-util-select",
-  "version": "5.0.0",
+  "version": "5.0.1",
   "description": "hast utility for `querySelector`, `querySelectorAll`, and `matches`",
   "license": "MIT",
   "keywords": [