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Add paragraphs about supported browsers and polyfills

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Andreas Hocevar
2016-07-07 12:25:53 +02:00
parent 343d2c032d
commit a60aee329c
3 changed files with 13 additions and 1 deletions
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doc/tutorials/introduction.md
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@@ -24,7 +24,9 @@ Although Closure library functions are widely used within OL3, none of them are
Unlike in, say, Node, where a module's exports are fixed in the source, with Closure Compiler, exports can be defined at compile time. This makes it easy to create builds that are customized to the needs of a particular site or application: a __custom build__ only exports those properties and methods needed by the site or application. As the full build is large, and will probably become larger as new features are added to the API, it's recommended that sites create a custom build for production software.
## Renderers and Browser Support
The library currently includes three renderers: Canvas, DOM, and WebGL. All three support both raster data from tile/image servers, and vector data; WebGL however only supports Point vectors and does not support labels. Clearly only those browsers that [support Canvas](http://caniuse.com/canvas) can use the Canvas renderer. Equally, the WebGL renderer can only be used on those devices and [browsers](http://caniuse.com/webgl) that support WebGL. Internet Explorer versions before 9 are not supported at all.
The library currently includes three renderers: Canvas, DOM, and WebGL. All three support both raster data from tile/image servers, and vector data; WebGL however only supports Point vectors and does not support labels. Clearly only those browsers that [support Canvas](http://caniuse.com/canvas) can use the Canvas renderer. Equally, the WebGL renderer can only be used on those devices and [browsers](http://caniuse.com/webgl) that support WebGL.
OpenLayers runs on all modern browsers that support [HTML5](https://html.spec.whatwg.org/multipage/) and [ECMAScript 5](http://www.ecma-international.org/ecma-262/5.1/). This includes Chrome, Firefox, Safari and Edge. For older browsers and platforms like Internet Explorer (down to version 9) and Android 4.x, [polyfills](http://polyfill.io) for `requestAnimationFrame` and `Element.prototype.classList` are required.
The library is intended for use on both desktop/laptop and mobile devices.