Swedish letters in input placeholder makes form dirty on init

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[ ] feature request
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Current behavior Using reactive forms. When swedish letters (åäö) is used in a input placeholder, the form and input is initialized as dirty.

This only affects IE11, or perhaps also earlier versions of IE.

Expected behavior The form and input should not be dirty because of swedish letters in placeholder.

Minimal reproduction of the problem with instructions http://plnkr.co/edit/u3iEtQ?p=preview ~~http://plnkr.co/edit/LpZNI9m7j8m8tgXRFdVG?p=preview~~ (old plunk with typo and not working)

What is the motivation / use case for changing the behavior? bug

Please tell us about your environment: Windows 10

• Angular version: 4.0.2, also affects 2.x

• Browser: Internet Explorer 11

• Language: all

[flensrocker]

Same here with german umlauts.

[AnkHansen]

And after six hours of debugging - I can vote in that Danish characters has same flaw. In my case the letter ‘ø’.

Used all night yesterday digging through our code to figure out why 1 of 4 totally similar fields always was dirty - the 3 others not in Internet Explorer.

And lets just be honest - debugging Angular in dev mode in Internet Explorer 11 is not that fun.

First today a colleague noticed the difference that this field had placeholder “Leverandørnr”. Changing the danish translation fixed the issue. Logging in as English user - fixed the issue.

Anyone has a decent workaround for this? Or do we need to wait for the Angular Material team to pick this up - we have nearly 100% danish customer base - so this is quite critical for us.