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chartjs显示数值标签插件：chartjs-plugin-datalabels

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09/25
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Getting Started

#Installation

#npm

 

npm install chartjs-plugin-datalabels --save

This plugin can also be installed using Bower.

#CDN

 

By default, https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels returns the latest (minified) version, however it's highly recommended to always specify a version in order to avoid breaking changes. This can be achieved by appending @{version} to the url:

https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@1.1.2 // exact version
https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@1 // latest 1.x.x

Read more about jsDeliver versioning on their website.

#Download

 

You can download the latest version of chartjs-plugin-datalabels from the GitHub releases:

  • chartjs-plugin-datalabels.js (recommended for development)
  • chartjs-plugin-datalabels.min.js (recommended for production)
  • chartjs-plugin-datalabels.zip (contains .js and .min.js versions + samples)

#Integration

#HTML

<script src="https://cdn.jsdelivr.net/npm/chart.js@2.7.3/dist/Chart.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-datalabels@0.7.0"></script>

IMPORTANT

chartjs-plugin-datalabel must be loaded after the Chart.js library!

Once imported, the plugin is available under the global property ChartDataLabels. This is useful to register/unregister the plugin afterward.

#Module

import Chart from 'chart.js';
import ChartDataLabels from 'chartjs-plugin-datalabels';

#Registration

This plugin registers itself globally, meaning that once imported, all charts will display labels. In case you want it enabled only for a few charts, you first need to unregister it globally:

// NOTE: when imported as a <script> tag, use the global property 'ChartDataLabels'
Chart.plugins.unregister(ChartDataLabels);

Then, you can enabled the plugin only for specific charts:

var chart = new Chart(ctx, {
plugins: [ChartDataLabels],
options: {
// ...
}
})

See also Chart.js › Using plugins.

DEPRECATION

From version 1.x, this plugin will no longer be registered automatically (see #42 for details).

#Configuration

The plugin options can be changed at 3 different levels and are evaluated with the following priority:

  • per dataset: dataset.datalabels.*
  • per chart: options.plugins.datalabels.*
  • or globally: Chart.defaults.global.plugins.datalabels.*

For example:

// Change default options for ALL charts
Chart.helpers.merge(Chart.defaults.global.plugins.datalabels, {
color: '#FE777B'
});var chart = new Chart(ctx, {
options: {
plugins: {
// Change options for ALL labels of THIS CHART
datalabels: {
color: '#36A2EB'
}
}
},
data: {
datasets: [{
// Change options only for labels of THIS DATASET
datalabels: {
color: '#FFCE56'
}
}]
}
});