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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>Utils | Chart.js</title> <meta name="generator" content="VuePress 1.8.3"> <link rel="icon" href="/docs/3.9.1/favicon.ico"> <meta name="description" content="Open source HTML5 Charts for your website"> <link rel="preload" href="/docs/3.9.1/assets/css/0.styles.7d07a4d1.css" as="style"><link rel="preload" href="/docs/3.9.1/assets/js/app.7e0dc8c8.js" as="script"><link rel="preload" href="/docs/3.9.1/assets/js/2.3e2307f3.js" as="script"><link rel="preload" href="/docs/3.9.1/assets/js/261.928afea4.js" as="script"><link rel="prefetch" href="/docs/3.9.1/assets/js/10.edbecfa9.js"><link rel="prefetch" href="/docs/3.9.1/assets/js/100.f7a12d8b.js"><link rel="prefetch" href="/docs/3.9.1/assets/js/101.15c56dbb.js"><link rel="prefetch" href="/docs/3.9.1/assets/js/102.33b746ea.js"><link rel="prefetch" href="/docs/3.9.1/assets/js/103.850a4486.js"><link 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<ul class="sidebar-links"><li><a href="/docs/3.9.1/samples/information.html" class="sidebar-link">Information</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"><span>Tooltip</span> <span class="arrow right"></span></p> <!----></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/3.9.1/samples/utils.html" aria-current="page" class="active sidebar-link">Utils</a></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="utils"><a href="#utils" class="header-anchor">#</a> Utils</h1> <h2 id="disclaimer"><a href="#disclaimer" class="header-anchor">#</a> Disclaimer</h2> <p>The Utils file contains multiple helper functions that the chart.js sample pages use to generate charts. These functions are subject to change, including but not limited to breaking changes without prior notice.</p> <p>Because of this please don't rely on this file in production environments.</p> <h2 id="functions"><a href="#functions" class="header-anchor">#</a> Functions</h2> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">import</span> colorLib <span class="token keyword">from</span> <span class="token string">'@kurkle/color'</span><span class="token punctuation">;</span> <span class="token keyword">import</span> <span class="token punctuation">{</span>DateTime<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'luxon'</span><span class="token punctuation">;</span> <span class="token keyword">import</span> <span class="token string">'chartjs-adapter-luxon'</span><span class="token punctuation">;</span> <span class="token keyword">import</span> <span class="token punctuation">{</span>valueOrDefault<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../../dist/helpers.mjs'</span><span class="token punctuation">;</span> <span class="token comment">// Adapted from http://indiegamr.com/generate-repeatable-random-numbers-in-js/</span> <span class="token keyword">var</span> _seed <span class="token operator">=</span> Date<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">srand</span><span class="token punctuation">(</span><span class="token parameter">seed</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> _seed <span class="token operator">=</span> seed<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">rand</span><span class="token punctuation">(</span><span class="token parameter">min<span class="token punctuation">,</span> max</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> min <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>min<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> max <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>max<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> _seed <span class="token operator">=</span> <span class="token punctuation">(</span>_seed <span class="token operator">*</span> <span class="token number">9301</span> <span class="token operator">+</span> <span class="token number">49297</span><span class="token punctuation">)</span> <span class="token operator">%</span> <span class="token number">233280</span><span class="token punctuation">;</span> <span class="token keyword">return</span> min <span class="token operator">+</span> <span class="token punctuation">(</span>_seed <span class="token operator">/</span> <span class="token number">233280</span><span class="token punctuation">)</span> <span class="token operator">*</span> <span class="token punctuation">(</span>max <span class="token operator">-</span> min<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">numbers</span><span class="token punctuation">(</span><span class="token parameter">config</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">var</span> cfg <span class="token operator">=</span> config <span class="token operator">||</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token keyword">var</span> min <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>min<span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">var</span> max <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>max<span class="token punctuation">,</span> <span class="token number">100</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">var</span> from <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>from<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 keyword">var</span> count <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>count<span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">var</span> decimals <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>decimals<span class="token punctuation">,</span> <span class="token number">8</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">var</span> continuity <span class="token operator">=</span> <span class="token function">valueOrDefault</span><span class="token punctuation">(</span>cfg<span class="token punctuation">.</span>continuity<span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">var</span> dfactor <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">pow</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> decimals<span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token keyword">var</span> data <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">var</span> i<span class="token punctuation">,</span> value<span class="token punctuation">;</span> <span class="token keyword">for</span> <span class="token punctuation">(</span>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> count<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span> value <span class="token operator">=</span> <span class="token punctuation">(</span>from<span class="token punctuation">[</span>i<span class="token punctuation">]</span> <span class="token operator">||</span> <span class="token number">0</span><span class="token punctuation">)</span> <span class="token operator">+</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">rand</span><span class="token punctuation">(</span>min<span class="token punctuation">,</span> max<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">if</span> <span class="token punctuation">(</span><span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">rand</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator"><=</span> continuity<span class="token punctuation">)</span> <span class="token punctuation">{</span> data<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>Math<span class="token punctuation">.</span><span class="token function">round</span><span class="token punctuation">(</span>dfactor <span class="token operator">*</span> value<span class="token punctuation">)</span> <span class="token operator">/</span> dfactor<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span> data<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span><span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token punctuation">}</span> <span class="token keyword">return</span> data<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">points</span><span class="token punctuation">(</span><span class="token parameter">config</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">const</span> xs <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">numbers</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">const</span> ys <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">numbers</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">return</span> xs<span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token parameter">x<span class="token punctuation">,</span> i</span><span class="token punctuation">)</span> <span class="token operator">=></span> <span class="token punctuation">(</span><span class="token punctuation">{</span>x<span class="token punctuation">,</span> <span class="token literal-property property">y</span><span class="token operator">:</span> ys<span class="token punctuation">[</span>i<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 keyword">export</span> <span class="token keyword">function</span> <span class="token function">bubbles</span><span class="token punctuation">(</span><span class="token parameter">config</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">points</span><span class="token punctuation">(</span>config<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">map</span><span class="token punctuation">(</span><span class="token parameter">pt</span> <span class="token operator">=></span> <span class="token punctuation">{</span> pt<span class="token punctuation">.</span>r <span class="token operator">=</span> <span class="token keyword">this</span><span class="token punctuation">.</span><span class="token function">rand</span><span class="token punctuation">(</span>config<span class="token punctuation">.</span>rmin<span class="token punctuation">,</span> config<span class="token punctuation">.</span>rmax<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token keyword">return</span> pt<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 keyword">export</span> <span class="token keyword">function</span> <span class="token function">labels</span><span class="token punctuation">(</span><span class="token parameter">config</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">var</span> cfg <span class="token operator">=</span> config <span class="token operator">||</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token keyword">var</span> min <span class="token operator">=</span> cfg<span class="token punctuation">.</span>min <span class="token operator">||</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token keyword">var</span> max <span class="token operator">=</span> cfg<span class="token punctuation">.</span>max <span class="token operator">||</span> <span class="token number">100</span><span class="token punctuation">;</span> <span class="token keyword">var</span> count <span class="token operator">=</span> cfg<span class="token punctuation">.</span>count <span class="token operator">||</span> <span class="token number">8</span><span class="token punctuation">;</span> <span class="token keyword">var</span> step <span class="token operator">=</span> <span class="token punctuation">(</span>max <span class="token operator">-</span> min<span class="token punctuation">)</span> <span class="token operator">/</span> count<span class="token punctuation">;</span> <span class="token keyword">var</span> decimals <span class="token operator">=</span> cfg<span class="token punctuation">.</span>decimals <span class="token operator">||</span> <span class="token number">8</span><span class="token punctuation">;</span> <span class="token keyword">var</span> dfactor <span class="token operator">=</span> Math<span class="token punctuation">.</span><span class="token function">pow</span><span class="token punctuation">(</span><span class="token number">10</span><span class="token punctuation">,</span> decimals<span class="token punctuation">)</span> <span class="token operator">||</span> <span class="token number">0</span><span class="token punctuation">;</span> <span class="token keyword">var</span> prefix <span class="token operator">=</span> cfg<span class="token punctuation">.</span>prefix <span class="token operator">||</span> <span class="token string">''</span><span class="token punctuation">;</span> <span class="token keyword">var</span> values <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">var</span> i<span class="token punctuation">;</span> <span class="token keyword">for</span> <span class="token punctuation">(</span>i <span class="token operator">=</span> min<span class="token punctuation">;</span> i <span class="token operator"><</span> max<span class="token punctuation">;</span> i <span class="token operator">+=</span> step<span class="token punctuation">)</span> <span class="token punctuation">{</span> values<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>prefix <span class="token operator">+</span> Math<span class="token punctuation">.</span><span class="token function">round</span><span class="token punctuation">(</span>dfactor <span class="token operator">*</span> i<span class="token punctuation">)</span> <span class="token operator">/</span> dfactor<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">return</span> values<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">const</span> <span class="token constant">MONTHS</span> <span class="token operator">=</span> <span class="token punctuation">[</span> <span class="token string">'January'</span><span class="token punctuation">,</span> <span class="token string">'February'</span><span class="token punctuation">,</span> <span class="token string">'March'</span><span class="token punctuation">,</span> <span class="token string">'April'</span><span class="token punctuation">,</span> <span class="token string">'May'</span><span class="token punctuation">,</span> <span class="token string">'June'</span><span class="token punctuation">,</span> <span class="token string">'July'</span><span class="token punctuation">,</span> <span class="token string">'August'</span><span class="token punctuation">,</span> <span class="token string">'September'</span><span class="token punctuation">,</span> <span class="token string">'October'</span><span class="token punctuation">,</span> <span class="token string">'November'</span><span class="token punctuation">,</span> <span class="token string">'December'</span> <span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">months</span><span class="token punctuation">(</span><span class="token parameter">config</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">var</span> cfg <span class="token operator">=</span> config <span class="token operator">||</span> <span class="token punctuation">{</span><span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token keyword">var</span> count <span class="token operator">=</span> cfg<span class="token punctuation">.</span>count <span class="token operator">||</span> <span class="token number">12</span><span class="token punctuation">;</span> <span class="token keyword">var</span> section <span class="token operator">=</span> cfg<span class="token punctuation">.</span>section<span class="token punctuation">;</span> <span class="token keyword">var</span> values <span class="token operator">=</span> <span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">var</span> i<span class="token punctuation">,</span> value<span class="token punctuation">;</span> <span class="token keyword">for</span> <span class="token punctuation">(</span>i <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span> i <span class="token operator"><</span> count<span class="token punctuation">;</span> <span class="token operator">++</span>i<span class="token punctuation">)</span> <span class="token punctuation">{</span> value <span class="token operator">=</span> <span class="token constant">MONTHS</span><span class="token punctuation">[</span>Math<span class="token punctuation">.</span><span class="token function">ceil</span><span class="token punctuation">(</span>i<span class="token punctuation">)</span> <span class="token operator">%</span> <span class="token number">12</span><span class="token punctuation">]</span><span class="token punctuation">;</span> values<span class="token punctuation">.</span><span class="token function">push</span><span class="token punctuation">(</span>value<span class="token punctuation">.</span><span class="token function">substring</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> section<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">return</span> values<span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">const</span> <span class="token constant">COLORS</span> <span class="token operator">=</span> <span class="token punctuation">[</span> <span class="token string">'#4dc9f6'</span><span class="token punctuation">,</span> <span class="token string">'#f67019'</span><span class="token punctuation">,</span> <span class="token string">'#f53794'</span><span class="token punctuation">,</span> <span class="token string">'#537bc4'</span><span class="token punctuation">,</span> <span class="token string">'#acc236'</span><span class="token punctuation">,</span> <span class="token string">'#166a8f'</span><span class="token punctuation">,</span> <span class="token string">'#00a950'</span><span class="token punctuation">,</span> <span class="token string">'#58595b'</span><span class="token punctuation">,</span> <span class="token string">'#8549ba'</span> <span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">color</span><span class="token punctuation">(</span><span class="token parameter">index</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <span class="token constant">COLORS</span><span class="token punctuation">[</span>index <span class="token operator">%</span> <span class="token constant">COLORS</span><span class="token punctuation">.</span>length<span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">transparentize</span><span class="token punctuation">(</span><span class="token parameter">value<span class="token punctuation">,</span> opacity</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">var</span> alpha <span class="token operator">=</span> opacity <span class="token operator">===</span> <span class="token keyword">undefined</span> <span class="token operator">?</span> <span class="token number">0.5</span> <span class="token operator">:</span> <span class="token number">1</span> <span class="token operator">-</span> opacity<span class="token punctuation">;</span> <span class="token keyword">return</span> <span class="token function">colorLib</span><span class="token punctuation">(</span>value<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">alpha</span><span class="token punctuation">(</span>alpha<span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">rgbString</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">const</span> <span class="token constant">CHART_COLORS</span> <span class="token operator">=</span> <span class="token punctuation">{</span> <span class="token literal-property property">red</span><span class="token operator">:</span> <span class="token string">'rgb(255, 99, 132)'</span><span class="token punctuation">,</span> <span class="token literal-property property">orange</span><span class="token operator">:</span> <span class="token string">'rgb(255, 159, 64)'</span><span class="token punctuation">,</span> <span class="token literal-property property">yellow</span><span class="token operator">:</span> <span class="token string">'rgb(255, 205, 86)'</span><span class="token punctuation">,</span> <span class="token literal-property property">green</span><span class="token operator">:</span> <span class="token string">'rgb(75, 192, 192)'</span><span class="token punctuation">,</span> <span class="token literal-property property">blue</span><span class="token operator">:</span> <span class="token string">'rgb(54, 162, 235)'</span><span class="token punctuation">,</span> <span class="token literal-property property">purple</span><span class="token operator">:</span> <span class="token string">'rgb(153, 102, 255)'</span><span class="token punctuation">,</span> <span class="token literal-property property">grey</span><span class="token operator">:</span> <span class="token string">'rgb(201, 203, 207)'</span> <span class="token punctuation">}</span><span class="token punctuation">;</span> <span class="token keyword">const</span> <span class="token constant">NAMED_COLORS</span> <span class="token operator">=</span> <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 constant">CHART_COLORS</span><span class="token punctuation">.</span>orange<span class="token punctuation">,</span> <span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>yellow<span class="token punctuation">,</span> <span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>green<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 constant">CHART_COLORS</span><span class="token punctuation">.</span>purple<span class="token punctuation">,</span> <span class="token constant">CHART_COLORS</span><span class="token punctuation">.</span>grey<span class="token punctuation">,</span> <span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">namedColor</span><span class="token punctuation">(</span><span class="token parameter">index</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> <span class="token constant">NAMED_COLORS</span><span class="token punctuation">[</span>index <span class="token operator">%</span> <span class="token constant">NAMED_COLORS</span><span class="token punctuation">.</span>length<span class="token punctuation">]</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">newDate</span><span class="token punctuation">(</span><span class="token parameter">days</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> DateTime<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">plus</span><span class="token punctuation">(</span><span class="token punctuation">{</span>days<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toJSDate</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">newDateString</span><span class="token punctuation">(</span><span class="token parameter">days</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> DateTime<span class="token punctuation">.</span><span class="token function">now</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">plus</span><span class="token punctuation">(</span><span class="token punctuation">{</span>days<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">.</span><span class="token function">toISO</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> <span class="token keyword">export</span> <span class="token keyword">function</span> <span class="token function">parseISODate</span><span class="token punctuation">(</span><span class="token parameter">str</span><span class="token punctuation">)</span> <span class="token punctuation">{</span> <span class="token keyword">return</span> DateTime<span class="token punctuation">.</span><span class="token function">fromISO</span><span class="token punctuation">(</span>str<span class="token punctuation">)</span><span class="token punctuation">;</span> <span class="token punctuation">}</span> </code></pre></div><p><a href="https://github.com/chartjs/Chart.js/blob/master/docs/scripts/utils.js" target="_blank" rel="noopener noreferrer">File on github<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></p> <h2 id="components"><a href="#components" class="header-anchor">#</a> Components</h2> <p>Some of the samples make reference to a <code>components</code> object. This is an artifact of using a module bundler to build the samples. The creation of that components object is shown below. If chart.js is included as a browser script, these items are accessible via the <code>Chart</code> object, i.e <code>Chart.Tooltip</code>.</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token comment">// Add Chart components needed in samples here.</span> <span class="token comment">// Usable through `components[name]`.</span> <span class="token keyword">export</span> <span class="token punctuation">{</span>Tooltip<span class="token punctuation">}</span> <span class="token keyword">from</span> <span class="token string">'../../dist/chart.mjs'</span><span class="token punctuation">;</span> </code></pre></div><p><a href="https://github.com/chartjs/Chart.js/blob/master/docs/scripts/components.js" target="_blank" rel="noopener noreferrer">File on github<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></p></div> <footer class="page-edit"><!----> <div class="last-updated"><span class="prefix">Last Updated:</span> <span class="time">8/3/2022, 12:46:38 PM</span></div></footer> <div class="page-nav"><p class="inner"><span class="prev"> ← <a href="/docs/3.9.1/samples/plugins/quadrants.html" class="prev"> Quadrants </a></span> <!----></p></div> </main></div><div class="global-ui"></div></div> <script src="/docs/3.9.1/assets/js/app.7e0dc8c8.js" defer></script><script src="/docs/3.9.1/assets/js/2.3e2307f3.js" defer></script><script src="/docs/3.9.1/assets/js/261.928afea4.js" defer></script> </body> </html>