platform_detect
A library for detecting browser and platform type and version.
Usage
A simple usage example:
import 'package:platform_detect2/platform_detect.dart';
main() {
if (browser.isChrome) {
print('thank you for being a friend');
}
if (operatingSystem.isMac) {
print('');
}
}
Decorating the <html> element with CSS classes
This library can also be used to place CSS classes on the <html> element based on the
operating system, browser, or a specific supported feature.
Add the decorator.dart import as shown in the example below, and call decorateRootNodeWithPlatformClasses
within main in your application.
import 'package:platform_detect2/platform_detect.dart';
import 'package:platform_detect2/decorator.dart';
main() {
decorateRootNodeWithPlatformClasses();
}
The <html> node of your application will now look like something like this:
<html lang="en" class="ua-chrome ua-chrome45 ua-lt-chrome46 ua-lt-chrome47 os-mac no-touch no-mstouch">
<!-- ... -->
</html>
Feature detection
By default, the only browser feature that the library detects for you is touch / mstouch.
You can extend this functionality to bake in a Modernizr-esque implementation by creating your
own Feature instances, and passing a list of them as the features argument to
decorateRootNodeWithPlatformClasses:
import 'package:platform_detect2/platform_detect.dart';
import 'package:platform_detect2/decorator.dart';
// For instance, if you need to detect whether a browser supports H5 canvas stuff...
var canvasFeature = new Feature('canvas', new CanvasElement().context2D != null);
main() {
// Decorate HTML element
decorateRootNodeWithPlatformClasses(features: [canvasFeature]);
// Or use the `isSupported` field somewhere else in your app...
if (canvasFeature.isSupported) {
// Do something
} else {
// Fall back / warn / etc...
}
}
The <html> node of your application will now look like something like this
for browsers that support canvas:
<html lang="en" class="canvas ...">
<!-- ... -->
</html>
and something like this for browsers that don't support canvas:
<html lang="en" class="no-canvas ...">
<!-- ... -->
</html>