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# Developers
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Developer features allow extending and enhancing Chart.js in many different ways.
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## Latest resources
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Latest documentation and samples, including unreleased features, are available at:
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- https://www.chartjs.org/docs/master/
- https://www.chartjs.org/samples/master/
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## Development releases
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Latest builds are available for testing at:
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- https://www.chartjs.org/dist/master/Chart.js
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- https://www.chartjs.org/dist/master/Chart.min.js
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> Note: Development builds are currently only available via HTTP, so in order to include them in [JSFiddle](https://jsfiddle.net) or [CodePen](https://codepen.io), you need to access these tools via HTTP as well.
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**WARNING: Development builds MUST not be used for production purposes or as replacement for CDN.**
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## Browser support
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Chart.js offers support for the following browsers:
* Chrome 50+
* Firefox 45+
* Internet Explorer 11
* Edge 14+
* Safari 9+
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Browser support for the canvas element is available in all modern & major mobile browsers. [CanIUse ](https://caniuse.com/#feat=canvas )
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Thanks to [BrowserStack ](https://browserstack.com ) for allowing our team to test on thousands of browsers.
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## Previous versions
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Version 2 has a completely different API than earlier versions.
Most earlier version options have current equivalents or are the same.
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Please use the documentation that is available on [chartjs.org ](https://www.chartjs.org/docs/ ) for the current version of Chart.js.
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Please note - documentation for previous versions are available on the GitHub repo.
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- [1.x Documentation ](https://github.com/chartjs/Chart.js/tree/v1.1.1/docs )