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position.html
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<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Position | Chart.js</title>
<meta name="generator" content="VuePress 1.9.9">
<link rel="icon" href="/docs/latest/favicon.ico">
<meta name="description" content="Open source HTML5 Charts for your website">
<link rel="preload" href="/docs/latest/assets/css/0.styles.6dc2f403.css" as="style"><link rel="preload" href="/docs/latest/assets/js/app.1775731d.js" as="script"><link rel="preload" href="/docs/latest/assets/js/2.2c2b1036.js" as="script"><link rel="preload" href="/docs/latest/assets/js/267.c48b8214.js" as="script"><link rel="preload" href="/docs/latest/assets/js/3.bb127fce.js" as="script"><link rel="prefetch" href="/docs/latest/assets/js/10.ba172174.js"><link rel="prefetch" href="/docs/latest/assets/js/100.559bdb31.js"><link rel="prefetch" href="/docs/latest/assets/js/101.734a357a.js"><link rel="prefetch" href="/docs/latest/assets/js/102.e53ce872.js"><link rel="prefetch" href="/docs/latest/assets/js/103.9940e4fa.js"><link rel="prefetch" href="/docs/latest/assets/js/104.469f66c7.js"><link rel="prefetch" href="/docs/latest/assets/js/105.5ae465af.js"><link rel="prefetch" href="/docs/latest/assets/js/106.716d6eac.js"><link rel="prefetch" href="/docs/latest/assets/js/107.0833c00c.js"><link 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<span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav> <ul class="sidebar-links"><li><a href="/docs/latest/samples/information.html" class="sidebar-link">Chart.js Samples</a></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Bar Charts</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Line Charts</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Other charts</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Area charts</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Scales</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Scale Options</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Legend</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Title</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Subtitle</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>Tooltip</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/docs/latest/samples/tooltip/content.html" class="sidebar-link">Custom Tooltip Content</a></li><li><a href="/docs/latest/samples/tooltip/html.html" class="sidebar-link">External HTML Tooltip</a></li><li><a href="/docs/latest/samples/tooltip/interactions.html" class="sidebar-link">Interaction Modes</a></li><li><a href="/docs/latest/samples/tooltip/point-style.html" class="sidebar-link">Point Style</a></li><li><a href="/docs/latest/samples/tooltip/position.html" aria-current="page" class="active sidebar-link">Position</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Scriptable Options</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Animations</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Advanced</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>Plugins</span> <span class="arrow right"></span></p> <!----></section></li><li><a href="/docs/latest/samples/utils.html" class="sidebar-link">Utils</a></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="position"><a href="#position" class="header-anchor">#</a> Position</h1> <p>This sample shows how to use the tooltip position mode setting.</p> <div class="chart-editor" data-v-409fe714><div class="chart-view" data-v-409fe714><canvas></canvas></div> <div class="chart-actions" data-v-6c4d3f30 data-v-409fe714></div> <div class="code-editor" data-v-2b4f0900 data-v-409fe714><div class="code-editor-header" data-v-2b4f0900><div class="code-editor-tabs" data-v-2b4f0900><button class="code-editor-tab active" data-v-2b4f0900>
config
</button><button class="code-editor-tab" data-v-2b4f0900>
positioner
</button><button class="code-editor-tab" data-v-2b4f0900>
setup
</button><button class="code-editor-tab" data-v-2b4f0900>
actions
</button></div> <div class="code-editor-tools" data-v-2b4f0900><!----> <a href="https://github.com/chartjs/Chart.js/blob/master/docs/samples/tooltip/position.md" title="View on GitHub" target="_blank" class="code-editor-tool fab fa-github fa-lg" data-v-2b4f0900></a></div></div> <div class="code-editor-views" data-v-2b4f0900><div class="editor-textarea ps" data-v-d2a140a2 data-v-2b4f0900><div class="editor-textarea-content" data-v-d2a140a2><div class="prism-editor-wrapper" data-v-d2a140a2><div class="prism-editor__container"><textarea spellCheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">const config = {
type: 'line',
data: data,
options: {
interaction: {
intersect: false,
mode: 'index',
},
plugins: {
title: {
display: true,
text: (ctx) => 'Tooltip position mode: ' + ctx.chart.options.plugins.tooltip.position,
},
}
}
};</textarea><pre data-testid="preview" class="prism-editor__editor"><span class="token keyword">const</span> config <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token literal-property property">type</span><span class="token operator">:</span> <span class="token string">'line'</span><span class="token punctuation">,</span>
<span class="token literal-property property">data</span><span class="token operator">:</span> data<span class="token punctuation">,</span>
<span class="token literal-property property">options</span><span class="token operator">:</span> <span class="token punctuation">{</span>
<span class="token literal-property property">interaction</span><span class="token operator">:</span> <span class="token punctuation">{</span>
<span class="token literal-property property">intersect</span><span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
<span class="token literal-property property">mode</span><span class="token operator">:</span> <span class="token string">'index'</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token literal-property property">plugins</span><span class="token operator">:</span> <span class="token punctuation">{</span>
<span class="token literal-property property">title</span><span class="token operator">:</span> <span class="token punctuation">{</span>
<span class="token literal-property property">display</span><span class="token operator">:</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
<span class="token function-variable function">text</span><span class="token operator">:</span> <span class="token punctuation">(</span><span class="token parameter">ctx</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token string">'Tooltip position mode: '</span> <span class="token operator">+</span> ctx<span class="token punctuation">.</span>chart<span class="token punctuation">.</span>options<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>tooltip<span class="token punctuation">.</span>position<span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br /></pre></div></div></div></div><div class="editor-textarea ps" style="display:none;" data-v-d2a140a2 data-v-2b4f0900><div class="editor-textarea-content" data-v-d2a140a2><div class="prism-editor-wrapper" data-v-d2a140a2><div class="prism-editor__container"><textarea spellCheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">// Create a custom tooltip positioner to put at the bottom of the chart area
components.Tooltip.positioners.bottom = function(items) {
const pos = components.Tooltip.positioners.average(items);
// Happens when nothing is found
if (pos === false) {
return false;
}
const chart = this.chart;
return {
x: pos.x,
y: chart.chartArea.bottom,
xAlign: 'center',
yAlign: 'bottom',
};
};</textarea><pre data-testid="preview" class="prism-editor__editor"><span class="token comment">// Create a custom tooltip positioner to put at the bottom of the chart area</span>
components<span class="token punctuation">.</span>Tooltip<span class="token punctuation">.</span>positioners<span class="token punctuation">.</span><span class="token function-variable function">bottom</span> <span class="token operator">=</span> <span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">items</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">const</span> pos <span class="token operator">=</span> components<span class="token punctuation">.</span>Tooltip<span class="token punctuation">.</span>positioners<span class="token punctuation">.</span><span class="token function">average</span><span class="token punctuation">(</span>items<span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token comment">// Happens when nothing is found</span>
<span class="token keyword">if</span> <span class="token punctuation">(</span>pos <span class="token operator">===</span> <span class="token boolean">false</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
<span class="token keyword">return</span> <span class="token boolean">false</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token keyword">const</span> chart <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span>chart<span class="token punctuation">;</span>
<span class="token keyword">return</span> <span class="token punctuation">{</span>
<span class="token literal-property property">x</span><span class="token operator">:</span> pos<span class="token punctuation">.</span>x<span class="token punctuation">,</span>
<span class="token literal-property property">y</span><span class="token operator">:</span> chart<span class="token punctuation">.</span>chartArea<span class="token punctuation">.</span>bottom<span class="token punctuation">,</span>
<span class="token literal-property property">xAlign</span><span class="token operator">:</span> <span class="token string">'center'</span><span class="token punctuation">,</span>
<span class="token literal-property property">yAlign</span><span class="token operator">:</span> <span class="token string">'bottom'</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br /></pre></div></div></div></div><div class="editor-textarea ps" style="display:none;" data-v-d2a140a2 data-v-2b4f0900><div class="editor-textarea-content" data-v-d2a140a2><div class="prism-editor-wrapper" data-v-d2a140a2><div class="prism-editor__container"><textarea spellCheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">const DATA_COUNT = 7;
const NUMBER_CFG = {count: DATA_COUNT, min: -100, max: 100};
const data = {
labels: Utils.months({count: DATA_COUNT}),
datasets: [
{
label: 'Dataset 1',
data: Utils.numbers(NUMBER_CFG),
fill: false,
borderColor: Utils.CHART_COLORS.red,
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.red, 0.5),
},
{
label: 'Dataset 2',
data: Utils.numbers(NUMBER_CFG),
fill: false,
borderColor: Utils.CHART_COLORS.blue,
backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue, 0.5),
},
]
};</textarea><pre data-testid="preview" class="prism-editor__editor"><span class="token keyword">const</span> <span class="token constant">DATA_COUNT</span> <span class="token operator">=</span> <span class="token number">7</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> <span class="token constant">NUMBER_CFG</span> <span class="token operator">=</span> <span class="token punctuation">{</span><span class="token literal-property property">count</span><span class="token operator">:</span> <span class="token constant">DATA_COUNT</span><span class="token punctuation">,</span> <span class="token literal-property property">min</span><span class="token operator">:</span> <span class="token operator">-</span><span class="token number">100</span><span class="token punctuation">,</span> <span class="token literal-property property">max</span><span class="token operator">:</span> <span class="token number">100</span><span class="token punctuation">}</span><span class="token punctuation">;</span>
<span class="token keyword">const</span> data <span class="token operator">=</span> <span class="token punctuation">{</span>
<span class="token literal-property property">labels</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token function">months</span><span class="token punctuation">(</span><span class="token punctuation">{</span><span class="token literal-property property">count</span><span class="token operator">:</span> <span class="token constant">DATA_COUNT</span><span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token literal-property property">datasets</span><span class="token operator">:</span> <span class="token punctuation">[</span>
<span class="token punctuation">{</span>
<span class="token literal-property property">label</span><span class="token operator">:</span> <span class="token string">'Dataset 1'</span><span class="token punctuation">,</span>
<span class="token literal-property property">data</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token function">numbers</span><span class="token punctuation">(</span><span class="token constant">NUMBER_CFG</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token literal-property property">fill</span><span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
<span class="token literal-property property">borderColor</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>red<span class="token punctuation">,</span>
<span class="token literal-property property">backgroundColor</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token function">transparentize</span><span class="token punctuation">(</span>Utils<span class="token punctuation">.</span><span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>red<span class="token punctuation">,</span> <span class="token number">0.5</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">{</span>
<span class="token literal-property property">label</span><span class="token operator">:</span> <span class="token string">'Dataset 2'</span><span class="token punctuation">,</span>
<span class="token literal-property property">data</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token function">numbers</span><span class="token punctuation">(</span><span class="token constant">NUMBER_CFG</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token literal-property property">fill</span><span class="token operator">:</span> <span class="token boolean">false</span><span class="token punctuation">,</span>
<span class="token literal-property property">borderColor</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>blue<span class="token punctuation">,</span>
<span class="token literal-property property">backgroundColor</span><span class="token operator">:</span> Utils<span class="token punctuation">.</span><span class="token function">transparentize</span><span class="token punctuation">(</span>Utils<span class="token punctuation">.</span><span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>blue<span class="token punctuation">,</span> <span class="token number">0.5</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">]</span>
<span class="token punctuation">}</span><span class="token punctuation">;</span><br /></pre></div></div></div></div><div class="editor-textarea ps" style="display:none;" data-v-d2a140a2 data-v-2b4f0900><div class="editor-textarea-content" data-v-d2a140a2><div class="prism-editor-wrapper" data-v-d2a140a2><div class="prism-editor__container"><textarea spellCheck="false" autocapitalize="off" autocomplete="off" autocorrect="off" data-gramm="false" placeholder="" data-testid="textarea" class="prism-editor__textarea">const actions = [
{
name: 'Position: average',
handler(chart) {
chart.options.plugins.tooltip.position = 'average';
chart.update();
}
},
{
name: 'Position: nearest',
handler(chart) {
chart.options.plugins.tooltip.position = 'nearest';
chart.update();
}
},
{
name: 'Position: bottom (custom)',
handler(chart) {
chart.options.plugins.tooltip.position = 'bottom';
chart.update();
}
},
];</textarea><pre data-testid="preview" class="prism-editor__editor"><span class="token keyword">const</span> actions <span class="token operator">=</span> <span class="token punctuation">[</span>
<span class="token punctuation">{</span>
<span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'Position: average'</span><span class="token punctuation">,</span>
<span class="token function">handler</span><span class="token punctuation">(</span><span class="token parameter">chart</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
chart<span class="token punctuation">.</span>options<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>tooltip<span class="token punctuation">.</span>position <span class="token operator">=</span> <span class="token string">'average'</span><span class="token punctuation">;</span>
chart<span class="token punctuation">.</span><span class="token function">update</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">{</span>
<span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'Position: nearest'</span><span class="token punctuation">,</span>
<span class="token function">handler</span><span class="token punctuation">(</span><span class="token parameter">chart</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
chart<span class="token punctuation">.</span>options<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>tooltip<span class="token punctuation">.</span>position <span class="token operator">=</span> <span class="token string">'nearest'</span><span class="token punctuation">;</span>
chart<span class="token punctuation">.</span><span class="token function">update</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">{</span>
<span class="token literal-property property">name</span><span class="token operator">:</span> <span class="token string">'Position: bottom (custom)'</span><span class="token punctuation">,</span>
<span class="token function">handler</span><span class="token punctuation">(</span><span class="token parameter">chart</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
chart<span class="token punctuation">.</span>options<span class="token punctuation">.</span>plugins<span class="token punctuation">.</span>tooltip<span class="token punctuation">.</span>position <span class="token operator">=</span> <span class="token string">'bottom'</span><span class="token punctuation">;</span>
chart<span class="token punctuation">.</span><span class="token function">update</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
<span class="token punctuation">}</span><span class="token punctuation">,</span>
<span class="token punctuation">]</span><span class="token punctuation">;</span><br /></pre></div></div></div></div></div></div></div><h2 id="docs"><a href="#docs" class="header-anchor">#</a> Docs</h2> <ul><li><a href="/docs/latest/general/data-structures.html">Data structures (<code>labels</code>)</a></li> <li><a href="/docs/latest/charts/line.html">Line</a></li> <li><a href="/docs/latest/configuration/tooltip.html">Tooltip</a> <ul><li><a href="/docs/latest/configuration/tooltip.html#position-modes">Position Modes</a></li> <li><a href="/docs/latest/configuration/tooltip.html#custom-position-modes">Custom Position Modes</a></li></ul></li></ul></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">4/15/2025, 1:19:05 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev">
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