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1202 lines
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Chart.js
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Getting Started
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Installation
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Integration
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Usage
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General
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Responsive
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Pixel Ratio
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<a href="../general/interactions/">
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Interactions
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</a>
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<ul class="articles">
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<a href="../general/interactions/events.html">
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Events
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<a href="../general/interactions/modes.html">
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Modes
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<a href="../general/options.html">
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Options
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<a href="../general/colors.html">
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Colors
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Fonts
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<li class="chapter " data-level="1.4" data-path="./">
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Configuration
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<ul class="articles">
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<li class="chapter " data-level="1.4.1" data-path="animations.html">
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<a href="animations.html">
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Animations
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Layout
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<a href="legend.html">
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Legend
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<a href="title.html">
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Title
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</li>
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<li class="chapter " data-level="1.4.5" data-path="tooltip.html">
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<a href="tooltip.html">
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Tooltip
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</a>
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</li>
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<li class="chapter active" data-level="1.4.6" data-path="elements.html">
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<a href="elements.html">
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Elements
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.5" data-path="../charts/">
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<a href="../charts/">
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Charts
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.5.1" data-path="../charts/line.html">
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<a href="../charts/line.html">
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Line
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</a>
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</li>
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<li class="chapter " data-level="1.5.2" data-path="../charts/bar.html">
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<a href="../charts/bar.html">
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Bar
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</a>
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</li>
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<li class="chapter " data-level="1.5.3" data-path="../charts/radar.html">
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<a href="../charts/radar.html">
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Radar
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</a>
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</li>
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<li class="chapter " data-level="1.5.4" data-path="../charts/doughnut.html">
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<a href="../charts/doughnut.html">
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Doughnut & Pie
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</a>
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</li>
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<li class="chapter " data-level="1.5.5" data-path="../charts/polar.html">
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<a href="../charts/polar.html">
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Polar Area
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</a>
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</li>
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<li class="chapter " data-level="1.5.6" data-path="../charts/bubble.html">
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<a href="../charts/bubble.html">
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Bubble
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</a>
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</li>
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<li class="chapter " data-level="1.5.7" data-path="../charts/scatter.html">
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<a href="../charts/scatter.html">
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Scatter
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</a>
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</li>
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<li class="chapter " data-level="1.5.8" data-path="../charts/area.html">
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<a href="../charts/area.html">
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Area
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</a>
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</li>
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<li class="chapter " data-level="1.5.9" data-path="../charts/mixed.html">
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<a href="../charts/mixed.html">
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Mixed
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.6" data-path="../axes/">
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<a href="../axes/">
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Axes
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.6.1" data-path="../axes/cartesian/">
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<a href="../axes/cartesian/">
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Cartesian
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.6.1.1" data-path="../axes/cartesian/category.html">
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<a href="../axes/cartesian/category.html">
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Category
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</a>
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</li>
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<li class="chapter " data-level="1.6.1.2" data-path="../axes/cartesian/linear.html">
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<a href="../axes/cartesian/linear.html">
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Linear
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</a>
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</li>
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<li class="chapter " data-level="1.6.1.3" data-path="../axes/cartesian/logarithmic.html">
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<a href="../axes/cartesian/logarithmic.html">
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Logarithmic
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</a>
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</li>
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<li class="chapter " data-level="1.6.1.4" data-path="../axes/cartesian/time.html">
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<a href="../axes/cartesian/time.html">
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Time
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.6.2" data-path="../axes/radial/">
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<a href="../axes/radial/">
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Radial
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.6.2.1" data-path="../axes/radial/linear.html">
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<a href="../axes/radial/linear.html">
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Linear
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.6.3" data-path="../axes/labelling.html">
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<a href="../axes/labelling.html">
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Labelling
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</a>
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</li>
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<li class="chapter " data-level="1.6.4" data-path="../axes/styling.html">
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<a href="../axes/styling.html">
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Styling
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.7" data-path="../developers/">
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<a href="../developers/">
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Developers
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</a>
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<ul class="articles">
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<li class="chapter " data-level="1.7.1" data-path="../developers/api.html">
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<a href="../developers/api.html">
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Chart.js API
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</a>
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</li>
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<li class="chapter " data-level="1.7.2" data-path="../developers/updates.html">
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<a href="../developers/updates.html">
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Updating Charts
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</a>
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</li>
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<li class="chapter " data-level="1.7.3" data-path="../developers/plugins.html">
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<a href="../developers/plugins.html">
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Plugins
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</a>
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</li>
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<li class="chapter " data-level="1.7.4" data-path="../developers/charts.html">
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<a href="../developers/charts.html">
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New Charts
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</a>
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</li>
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<li class="chapter " data-level="1.7.5" data-path="../developers/axes.html">
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<a href="../developers/axes.html">
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New Axes
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</a>
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</li>
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<li class="chapter " data-level="1.7.6" data-path="../developers/contributing.html">
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<a href="../developers/contributing.html">
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Contributing
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</a>
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</li>
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</ul>
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</li>
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<li class="chapter " data-level="1.8" data-path="../notes/">
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<a href="../notes/">
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Additional Notes
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</a>
|
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<ul class="articles">
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<li class="chapter " data-level="1.8.1" data-path="../notes/comparison.html">
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<!-- Title -->
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<h1>
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<i class="fa fa-circle-o-notch fa-spin"></i>
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<a href=".." >Elements</a>
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</h1>
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</div>
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<div class="search-noresults">
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<section class="normal markdown-section">
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<h1 id="elements">Elements</h1>
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<p>While chart types provide settings to configure the styling of each dataset, you sometimes want to style <strong>all datasets the same way</strong>. A common example would be to stroke all of the bars in a bar chart with the same colour but change the fill per dataset. Options can be configured for four different types of elements: <strong><a href="#arc-configuration">arc</a></strong>, <strong><a href="#line-configuration">lines</a></strong>, <strong><a href="#point-configuration">points</a></strong>, and <strong><a href="#rectangle-configuration">rectangles</a></strong>. When set, these options apply to all objects of that type unless specifically overridden by the configuration attached to a dataset.</p>
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<h2 id="global-configuration">Global Configuration</h2>
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<p>The element options can be specified per chart or globally. The global options for elements are defined in <code>Chart.defaults.global.elements</code>. For example, to set the border width of all bar charts globally you would do:</p>
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<pre><code class="lang-javascript">Chart.defaults.global.elements.rectangle.borderWidth = <span class="hljs-number">2</span>;
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</code></pre>
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<h2 id="point-configuration">Point Configuration</h2>
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<p>Point elements are used to represent the points in a line chart or a bubble chart.</p>
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<p>Global point options: <code>Chart.defaults.global.elements.point</code></p>
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<table>
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<thead>
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<tr>
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<th>Name</th>
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<th>Type</th>
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<th>Default</th>
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>radius</code></td>
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<td><code>Number</code></td>
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<td><code>3</code></td>
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<td>Point radius.</td>
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</tr>
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<tr>
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<td><a href="#point-styles"><code>pointStyle</code></a></td>
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<td><code>String</code></td>
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<td><code>circle</code></td>
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<td>Point style.</td>
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</tr>
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<tr>
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<td><code>backgroundColor</code></td>
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<td><code>Color</code></td>
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<td><code>'rgba(0,0,0,0.1)'</code></td>
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<td>Point fill color.</td>
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</tr>
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<tr>
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<td><code>borderWidth</code></td>
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<td><code>Number</code></td>
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<td><code>1</code></td>
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<td>Point stroke width.</td>
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</tr>
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<tr>
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<td><code>borderColor</code></td>
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<td><code>Color</code></td>
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<td><code>'rgba(0,0,0,0.1)'</code></td>
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<td>Point stroke color.</td>
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</tr>
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<tr>
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<td><code>hitRadius</code></td>
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<td><code>Number</code></td>
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<td><code>1</code></td>
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<td>Extra radius added to point radius for hit detection.</td>
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</tr>
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<tr>
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<td><code>hoverRadius</code></td>
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<td><code>Number</code></td>
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<td><code>4</code></td>
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<td>Point radius when hovered.</td>
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</tr>
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<tr>
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<td><code>hoverBorderWidth</code></td>
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<td><code>Number</code></td>
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<td><code>1</code></td>
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<td>Stroke width when hovered.</td>
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</tr>
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</tbody>
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</table>
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<h3 id="point-styles">Point Styles</h3>
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<p>The following values are supported:</p>
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<ul>
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<li><code>'circle'</code></li>
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<li><code>'cross'</code></li>
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<li><code>'crossRot'</code></li>
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<li><code>'dash'</code></li>
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<li><code>'line'</code></li>
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<li><code>'rect'</code></li>
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<li><code>'rectRounded'</code></li>
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<li><code>'rectRot'</code></li>
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<li><code>'star'</code></li>
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<li><code>'triangle'</code></li>
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</ul>
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<p>If the value is an image, that image is drawn on the canvas using <a href="https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/drawImage" target="_blank">drawImage</a>.</p>
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<h2 id="line-configuration">Line Configuration</h2>
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<p>Line elements are used to represent the line in a line chart.</p>
|
|
<p>Global line options: <code>Chart.defaults.global.elements.line</code></p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>Name</th>
|
|
<th>Type</th>
|
|
<th>Default</th>
|
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<th>Description</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><code>tension</code></td>
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<td><code>Number</code></td>
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<td><code>0.4</code></td>
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<td>Bézier curve tension (<code>0</code> for no Bézier curves).</td>
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</tr>
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<tr>
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<td><code>backgroundColor</code></td>
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<td><code>Color</code></td>
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<td><code>'rgba(0,0,0,0.1)'</code></td>
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<td>Line fill color.</td>
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</tr>
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<tr>
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<td><code>borderWidth</code></td>
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<td><code>Number</code></td>
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<td><code>3</code></td>
|
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<td>Line stroke width.</td>
|
|
</tr>
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<tr>
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<td><code>borderColor</code></td>
|
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<td><code>Color</code></td>
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<td><code>'rgba(0,0,0,0.1)'</code></td>
|
|
<td>Line stroke color.</td>
|
|
</tr>
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<tr>
|
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<td><code>borderCapStyle</code></td>
|
|
<td><code>String</code></td>
|
|
<td><code>'butt'</code></td>
|
|
<td>Line cap style (see <a href="https://developer.mozilla.org/en/docs/Web/API/CanvasRenderingContext2D/lineCap" target="_blank">MDN</a>).</td>
|
|
</tr>
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<tr>
|
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<td><code>borderDash</code></td>
|
|
<td><code>Array</code></td>
|
|
<td><code>[]</code></td>
|
|
<td>Line dash (see <a href="https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/setLineDash" target="_blank">MDN</a>).</td>
|
|
</tr>
|
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<tr>
|
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<td><code>borderDashOffset</code></td>
|
|
<td><code>Number</code></td>
|
|
<td><code>0</code></td>
|
|
<td>Line dash offset (see <a href="https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineDashOffset" target="_blank">MDN</a>).</td>
|
|
</tr>
|
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<tr>
|
|
<td><code>borderJoinStyle</code></td>
|
|
<td><code>String</code></td>
|
|
<td><code>'miter</code></td>
|
|
<td>Line join style (see <a href="https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/lineJoin" target="_blank">MDN</a>).</td>
|
|
</tr>
|
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<tr>
|
|
<td><code>capBezierPoints</code></td>
|
|
<td><code>Boolean</code></td>
|
|
<td><code>true</code></td>
|
|
<td><code>true</code> to keep Bézier control inside the chart, <code>false</code> for no restriction.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>fill</code></td>
|
|
<td><code>Boolean/String</code></td>
|
|
<td><code>true</code></td>
|
|
<td>Fill location: <code>'zero'</code>, <code>'top'</code>, <code>'bottom'</code>, <code>true</code> (eq. <code>'zero'</code>) or <code>false</code> (no fill).</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>stepped</code></td>
|
|
<td><code>Boolean</code></td>
|
|
<td><code>false</code></td>
|
|
<td><code>true</code> to show the line as a stepped line (<code>tension</code> will be ignored).</td>
|
|
</tr>
|
|
</tbody>
|
|
</table>
|
|
<h2 id="rectangle-configuration">Rectangle Configuration</h2>
|
|
<p>Rectangle elements are used to represent the bars in a bar chart.</p>
|
|
<p>Global rectangle options: <code>Chart.defaults.global.elements.rectangle</code></p>
|
|
<table>
|
|
<thead>
|
|
<tr>
|
|
<th>Name</th>
|
|
<th>Type</th>
|
|
<th>Default</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
</thead>
|
|
<tbody>
|
|
<tr>
|
|
<td><code>backgroundColor</code></td>
|
|
<td><code>Color</code></td>
|
|
<td><code>'rgba(0,0,0,0.1)'</code></td>
|
|
<td>Bar fill color.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>borderWidth</code></td>
|
|
<td><code>Number</code></td>
|
|
<td><code>0</code></td>
|
|
<td>Bar stroke width.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>borderColor</code></td>
|
|
<td><code>Color</code></td>
|
|
<td><code>'rgba(0,0,0,0.1)'</code></td>
|
|
<td>Bar stroke color.</td>
|
|
</tr>
|
|
<tr>
|
|
<td><code>borderSkipped</code></td>
|
|
<td><code>String</code></td>
|
|
<td><code>'bottom'</code></td>
|
|
<td>Skipped (excluded) border: <code>'bottom'</code>, <code>'left'</code>, <code>'top'</code> or <code>'right'</code>.</td>
|
|
</tr>
|
|
</tbody>
|
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</table>
|
|
<h2 id="arc-configuration">Arc Configuration</h2>
|
|
<p>Arcs are used in the polar area, doughnut and pie charts.</p>
|
|
<p>Global arc options: <code>Chart.defaults.global.elements.arc</code>.</p>
|
|
<table>
|
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<thead>
|
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<tr>
|
|
<th>Name</th>
|
|
<th>Type</th>
|
|
<th>Default</th>
|
|
<th>Description</th>
|
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</tr>
|
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</thead>
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<tbody>
|
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<tr>
|
|
<td><code>backgroundColor</code></td>
|
|
<td><code>Color</code></td>
|
|
<td><code>'rgba(0,0,0,0.1)'</code></td>
|
|
<td>Arc fill color.</td>
|
|
</tr>
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<tr>
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|
<td><code>borderColor</code></td>
|
|
<td><code>Color</code></td>
|
|
<td><code>'#fff'</code></td>
|
|
<td>Arc stroke color.</td>
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</tr>
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<tr>
|
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<td><code>borderWidth</code></td>
|
|
<td><code>Number</code></td>
|
|
<td><code>2</code></td>
|
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<td>Arc stroke width.</td>
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</tr>
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</tbody>
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