MDCCheckbox, inconsistent behavior on IE

[anton-kachurin]

What MDC-Web Version are you using?

0.23.0

What browser(s) is this bug affecting?

Internet Explorer 11, Edge

What OS are you using?

Windows 10

What are the steps to reproduce the bug?

1. Open the demo page: https://material-components-web.appspot.com/checkbox.html
2. Scroll down to "With JavaScript" examples
3. Check the "Default checkbox"
4. Click Toggle indeterminate
5. Click on the checkbox

What is the expected behavior?

In Chrome and Firefox, the checkbox will be unchecked at this point.

What is the actual behavior?

In Internet Explorer, it's checked.

[lynnmercier]

Looks like a bug! Thanks for filing.

[anton-kachurin]

Turns out, it's a well-known behavior of IE, very good explained in this StackOverflow answer:
https://stackoverflow.com/a/33529024

The question is if MDCCheckbox should unify this behavior across the browsers (i.e to force IE to behave like any other browser) or if it should be left up to app developers.

[Havret]

It would be great if we have the behavior unified out of the box.

[bonniezhou]

We don't plan to unify this behavior since it seems to be a specific implementation decision by the browser. Closing as working as intended.