polyfill Element.matches (fixes #1223)

[markbrouch]

This fixes a bug (#1223) in IE and older versions of Chrome that use a non-standard name for Element.matches() by implementing a polyfill.

Please advise if there is a more appropriate place to implement this polyfill.

[markbrouch]

@eddyerburgh it looks like jsdom globals are turned off in node env: https://github.com/vuejs/vue-test-utils/blob/dev/test/setup/mocha.setup.js#L3

This causes tests to fail on this change because Element does not exist outside of jsdom. What's the intent of disabling jsdom globals for node env?

[eddyerburgh]

The tests run for both @vue/test-utils and @vue/server-test-utils.

Can you add the polyfill in mount.js, which is only used in @vue/test-utils.

[markbrouch]

The tests run for both @vue/test-utils and @vue/server-test-utils.

Can you add the polyfill in mount.js, which is only used in @vue/test-utils.

I moved the polyfill to its own module that is invoked in mount.js.

[eddyerburgh]

Thank you :)

[vue-bot]

Hey @markbrouch, thank you for your time and effort spent on this PR, contributions like yours help make Vue better for everyone. Cheers! 💚

[asinakdeniz]

Hi @eddyerburgh,
As I understood, this fix has not been released yet, when are you planning to get release? Thanks...