Check browser version using Dart rather than JS?

Question

Is there an "Angular/Dart" way to detect older unsupported browsers and prevent to continue with an elegant message (there are plenty of examples using javascript) rather than continue and show a weird layout with code that doesn't work?

Even the angulardart.org/demo site should do this IMO to stop IE8 (I know, but some enterprise customers still have those old browsers installed - and set as default - for legacy apps) from showing content that doesn't even work.

angulardart.org/demo

Alexandre Ardhuin · Accepted Answer · 2014-03-06 08:41:21Z

1

If Dart code cannot be executed the test has to be done in Js. I'm not aware of a library that makes this test.

The test should follow What browsers do you support as JavaScript compilation targets?.

answered Mar 6, 2014 at 8:41

Alexandre Ardhuin

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6 Comments

Geert Over a year ago

Question is, how can one check the browser version using Dart code (whether or not via dart2js)?

Alexandre Ardhuin Over a year ago

You shouldn't make this test in Dart because you cannot be sure that the code will be executed as expected. That's why this test should be coded in plain old JS.

Geert Over a year ago

Surely a dart app should also be able to verify the browser version without having to rely on plain old JS as well. So how does one access the browser info from Dart code?

Alexandre Ardhuin Over a year ago

See window.navigator.userAgent.

Geert Over a year ago

Thanks Alexandre, that's indeed what I was after ... but I am a bit disappointed with "Experimental, Supported on: Chrome, Safari", so no Firefox, IE, Opera ... ?

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