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Animations                            </a>                                </li>            <li class="chapter " data-level="1.4.2" data-path="../configuration/layout.html">                            <a href="../configuration/layout.html">                                                    Layout                            </a>                                </li>            <li class="chapter " data-level="1.4.3" data-path="../configuration/legend.html">                            <a href="../configuration/legend.html">                                                    Legend                            </a>                                </li>            <li class="chapter " data-level="1.4.4" data-path="../configuration/title.html">                            <a href="../configuration/title.html">                                                    Title                            </a>                                </li>            <li class="chapter " data-level="1.4.5" 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                   Line                            </a>                                </li>            <li class="chapter " data-level="1.5.2" data-path="bar.html">                            <a href="bar.html">                                                    Bar                            </a>                                </li>            <li class="chapter " data-level="1.5.3" data-path="radar.html">                            <a href="radar.html">                                                    Radar                            </a>                                </li>            <li class="chapter " data-level="1.5.4" data-path="doughnut.html">                            <a href="doughnut.html">                                                    Doughnut & Pie                            </a>                                </li>            <li class="chapter " data-level="1.5.5" data-path="polar.html">                            <a href="polar.html">                                                    Polar Area                            </a>                                </li>            <li class="chapter " data-level="1.5.6" data-path="bubble.html">                            <a href="bubble.html">                                                    Bubble                            </a>                                </li>            <li class="chapter " data-level="1.5.7" data-path="scatter.html">                            <a href="scatter.html">                                                    Scatter                            </a>                                </li>            <li class="chapter active" data-level="1.5.8" data-path="area.html">                            <a href="area.html">                                                    Area                            </a>                                </li>            <li class="chapter " data-level="1.5.9" data-path="mixed.html">                            <a href="mixed.html">                                                    Mixed                            </a>                                </li>                </ul>                    </li>            <li class="chapter " data-level="1.6" data-path="../axes/">                            <a href="../axes/">                                                    Axes                            </a>                                    <ul class="articles">                            <li class="chapter " data-level="1.6.1" data-path="../axes/cartesian/">                            <a href="../axes/cartesian/">                                                    Cartesian                            </a>                                    <ul class="articles">                            <li class="chapter " data-level="1.6.1.1" data-path="../axes/cartesian/category.html">                            <a href="../axes/cartesian/category.html">                                                    Category                          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Updating Charts                            </a>                                </li>            <li class="chapter " data-level="1.7.3" data-path="../developers/plugins.html">                            <a href="../developers/plugins.html">                                                    Plugins                            </a>                                </li>            <li class="chapter " data-level="1.7.4" data-path="../developers/charts.html">                            <a href="../developers/charts.html">                                                    New Charts                            </a>                                </li>            <li class="chapter " data-level="1.7.5" data-path="../developers/axes.html">                            <a href="../developers/axes.html">                                                    New Axes                            </a>                                </li>            <li class="chapter " data-level="1.7.6" 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</h1></div>                    <div class="page-wrapper" tabindex="-1" role="main">                        <div class="page-inner">                            <div class="search-plus" id="book-search-results">    <div class="search-noresults">                                    <section class="normal markdown-section">                                                                <h1 id="area-charts">Area Charts</h1><p>Both <a href="line.html">line</a> and <a href="radar.html">radar</a> charts support a <code>fill</code> option on the dataset object which can be used to create area between two datasets or a dataset and a boundary, i.e. the scale <code>origin</code>, <code>start</code> or <code>end</code> (see <a href="#filling-modes">filling modes</a>).</p><blockquote><p><strong>Note:</strong> this feature is implemented by the <a href="https://github.com/chartjs/Chart.js/blob/master/src/plugins/plugin.filler.js" target="_blank"><code>filler</code> plugin</a>.</p></blockquote><h2 id="filling-modes">Filling modes</h2><table><thead><tr><th style="text-align:left">Mode</th><th style="text-align:left">Type</th><th style="text-align:left">Values</th></tr></thead><tbody><tr><td style="text-align:left">Absolute dataset index <sup>1</sup></td><td style="text-align:left"><code>Number</code></td><td style="text-align:left"><code>1</code>, <code>2</code>, <code>3</code>, ...</td></tr><tr><td style="text-align:left">Relative dataset index <sup>1</sup></td><td style="text-align:left"><code>String</code></td><td style="text-align:left"><code>'-1'</code>, <code>'-2'</code>, <code>'+1'</code>, ...</td></tr><tr><td style="text-align:left">Boundary <sup>2</sup></td><td style="text-align:left"><code>String</code></td><td style="text-align:left"><code>'start'</code>, <code>'end'</code>, <code>'origin'</code></td></tr><tr><td style="text-align:left">Disabled <sup>3</sup></td><td style="text-align:left"><code>Boolean</code></td><td style="text-align:left"><code>false</code></td></tr></tbody></table><blockquote><p><sup>1</sup> dataset filling modes have been introduced in version 2.6.0<br><sup>2</sup> prior version 2.6.0, boundary values was <code>'zero'</code>, <code>'top'</code>, <code>'bottom'</code> (deprecated)<br><sup>3</sup> for backward compatibility, <code>fill: true</code> (default) is equivalent to <code>fill: 'origin'</code><br></p></blockquote><p><strong>Example</strong></p><pre><code class="lang-javascript"><span class="hljs-keyword">new</span> Chart(ctx, {    data: {        datasets: [            {fill: <span class="hljs-string">'origin'</span>},      <span class="hljs-comment">// 0: fill to 'origin'</span>            {fill: <span class="hljs-string">'+2'</span>},          <span class="hljs-comment">// 1: fill to dataset 3</span>            {fill: <span class="hljs-number">1</span>},             <span class="hljs-comment">// 2: fill to dataset 1</span>            {fill: <span class="hljs-literal">false</span>},         <span class="hljs-comment">// 3: no fill</span>            {fill: <span class="hljs-string">'-2'</span>}           <span class="hljs-comment">// 4: fill to dataset 2</span>        ]    }})</code></pre><h2 id="configuration">Configuration</h2><table><thead><tr><th style="text-align:left">Option</th><th style="text-align:left">Type</th><th style="text-align:left">Default</th><th style="text-align:left">Description</th></tr></thead><tbody><tr><td style="text-align:left"><a href="#propagate"><code>plugins.filler.propagate</code></a></td><td style="text-align:left"><code>Boolean</code></td><td style="text-align:left"><code>true</code></td><td style="text-align:left">Fill propagation when target is hidden</td></tr></tbody></table><h3 id="propagate">propagate</h3><p>Boolean (default: <code>true</code>)</p><p>If <code>true</code>, the fill area will be recursively extended to the visible target defined by the <code>fill</code> value of hidden dataset targets:</p><p><strong>Example</strong></p><pre><code class="lang-javascript"><span class="hljs-keyword">new</span> Chart(ctx, {    data: {        datasets: [            {fill: <span class="hljs-string">'origin'</span>},   <span class="hljs-comment">// 0: fill to 'origin'</span>            {fill: <span class="hljs-string">'-1'</span>},       <span class="hljs-comment">// 1: fill to dataset 0</span>            {fill: <span class="hljs-number">1</span>},          <span class="hljs-comment">// 2: fill to dataset 1</span>            {fill: <span class="hljs-literal">false</span>},      <span class="hljs-comment">// 3: no fill</span>            {fill: <span class="hljs-string">'-2'</span>}        <span class="hljs-comment">// 4: fill to dataset 2</span>        ]    },    options: {        plugins: {            filler: {                propagate: <span class="hljs-literal">true</span>            }        }    }})</code></pre><p><code>propagate: true</code>:</p><ul><li>if dataset 2 is hidden, dataset 4 will fill to dataset 1</li><li>if dataset 2 and 1 are hidden, dataset 4 will fill to <code>'origin'</code></li></ul><p><code>propagate: false</code>:</p><ul><li>if dataset 2 and/or 4 are hidden, dataset 4 will not be filled</li></ul>                                                                </section>                                </div>    <div class="search-results">        <div class="has-results">                        <h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>            <ul class="search-results-list"></ul>                    </div>        <div class="no-results">                        <h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1>                    </div>    </div></div>                        </div>                    </div>                            </div>                                            <a 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