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(chartjs-plugin-zoom
A zoom and pan plugin for Chart.js. Currently requires Chart.js >= 2.6.0
Panning can be done via the mouse or with a finger.
Zooming is done via the mouse wheel or via a pinch gesture. Hammer.js is used for gesture recognition.
Installation
Run npm install --save chartjs-plugin-zoom to install with npm.
If including via a <script> tag, make sure to include Hammer.js as well:
<script src="https://cdn.jsdelivr.net/npm/chart.js@2.9.1"></script>
<script src="https://cdn.jsdelivr.net/npm/hammerjs@2.0.8"></script>
<script src="https://cdn.jsdelivr.net/npm/chartjs-plugin-zoom@0.7.4"></script>
Configuration
To configure the zoom and pan plugin, you can simply add new config options to your chart config.
plugins: {
zoom: {
// Container for pan options
pan: {
// Boolean to enable panning
enabled: true,
// Panning directions. Remove the appropriate direction to disable
// Eg. 'y' would only allow panning in the y direction
// A function that is called as the user is panning and returns the
// available directions can also be used:
// mode: function({ chart }) {
// return 'xy';
// },
mode: 'xy',
rangeMin: {
// Format of min pan range depends on scale type
x: null,
y: null
},
rangeMax: {
// Format of max pan range depends on scale type
x: null,
y: null
},
// Function called while the user is panning
onPan: function({chart}) { console.log(`I'm panning!!!`); },
// Function called once panning is completed
onPanComplete: function({chart}) { console.log(`I was panned!!!`); }
},
// Container for zoom options
zoom: {
// Boolean to enable zooming
enabled: true,
// Enable drag-to-zoom behavior
drag: true,
// Drag-to-zoom effect can be customized
// drag: {
// borderColor: 'rgba(225,225,225,0.3)'
// borderWidth: 5,
// backgroundColor: 'rgb(225,225,225)',
// animationDuration: 0
// },
// Zooming directions. Remove the appropriate direction to disable
// Eg. 'y' would only allow zooming in the y direction
// A function that is called as the user is zooming and returns the
// available directions can also be used:
// mode: function({ chart }) {
// return 'xy';
// },
mode: 'xy',
rangeMin: {
// Format of min zoom range depends on scale type
x: null,
y: null
},
rangeMax: {
// Format of max zoom range depends on scale type
x: null,
y: null
},
// Speed of zoom via mouse wheel
// (percentage of zoom on a wheel event)
speed: 0.1,
// Function called while the user is zooming
onZoom: function({chart}) { console.log(`I'm zooming!!!`); },
// Function called once zooming is completed
onZoomComplete: function({chart}) { console.log(`I was zoomed!!!`); }
}
}
}
API
chart.resetZoom()
Programmatically resets the zoom to the default state. See samples/zoom-time.html for an example.
Installation
To download a zip, go to the chartjs-plugin-zoom.js on Github
To install via npm / bower:
npm install chartjs-plugin-zoom --save
Prior to v0.4.0, this plugin was known as 'Chart.Zoom.js'. Old versions are still available on npm under that name.
Documentation
You can find documentation for Chart.js at www.chartjs.org/docs.
Examples for this plugin are available in the samples folder.
Contributing
Before submitting an issue or a pull request to the project, please take a moment to look over the contributing guidelines first.
License
chartjs-plugin-zoom.js is available under the MIT license.