Lodash _.every() Method Last Updated : 03 Sep, 2024 Comments Improve Suggest changes Like Article Like Report Lodash _.every() method checks if the predicate returns true for all elements of the collection and iteration is stopped once the predicate returns falsely. Note: Also this method returns true for empty collections because everything is true for elements of empty collections. Syntax_.every(collection, [predicate=_.identity]);Parameters: collection (Array|Object): This parameter holds the collection to iterate over. [predicate=_.identity] (Function): This parameter holds the function invoked per iteration.Return Value: This method is used to return true if all elements pass the predicate check, else false. Example 1: In this example, we are checking is every element of the given array has that data type or not and printing the result by the use of the _.every() method. javascript // Requiring the lodash library const _ = require("lodash"); // Original array let obj1 = ([true, 1, null, 'yes']); let obj2 = ([true, 2, 'active', 'yes']); // Use of _.every() method let x = _.every(obj1, Boolean); let y = _.every(obj2, Boolean); // Printing the output console.log(x); console.log(y); Output:falsetrueExample 2: In this example, we are checking is every element of the given array has that same object or not and printing the result by the use of the _.every() method. javascript // Requiring the lodash library const _ = require("lodash"); // Original array let users = [{ 'user': 'jonny', 'age': 30, 'active': false }, { 'user': 'harry', 'age': 35, 'active': false }]; // Use of _.every() method // The `_.matches` iteratee shorthand. let x = _.every(users, { 'user': 'barney', 'active': false }); // Printing the output console.log(x); Output:falseExample 3: In this example, we are checking is every element of the given array of objects has that same field or not and printing the result by the use of the _.every() method. javascript // Requiring the lodash library const _ = require("lodash"); // Original array let users = [ { 'user': 'jonny', 'age': 30, 'active': false }, { 'user': 'harry', 'age': 35, 'active': false } ]; // Use of _.every() method // The `_.matchesProperty` iteratee shorthand. let x = _.every(users, ['active', false]); // Printing the output console.log(x); Output:trueExample 4: In this example, we are checking is every element of the given array of objects has that string or not and printing the result by the use of the _.every() method. javascript // Requiring the lodash library const _ = require("lodash"); // Original array let users = [ { 'user': 'jonny', 'age': 30, 'active': false }, { 'user': 'harry', 'age': 35, 'active': false } ]; // Use of _.every() method // The `_.property` iteratee shorthand. let x = _.every(users, 'active'); // Printing the output console.log(x); Output:false Comment More infoAdvertise with us Next Article Lodash _.filter() Method S shivanisinghss2110 Follow Improve Article Tags : JavaScript Web Technologies JavaScript-Lodash Similar Reads Lodash Lodash is a JavaScript library that works on the top of underscore.js. 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