[Select] Scrolling causes options to scroll away

[taysonvo]

Bug, feature request, or proposal:

What is the expected behavior?

It should scroll but should inside the content.

What is the current behavior?

Running out of the content, PSA.

What are the steps to reproduce?

0. go to: https://material.angular.io/components/select/examples
1. Just click on the arrow to dropped down the Options.
2. Use mouse and scroll down the page and see the Options running out of the content.

What is the use-case or motivation for changing an existing behavior?

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Is there anything else we should know?

[andrewseguin]

Cannot reproduce - scrolling doesn't work with the mousewheel and clicking on the scrollbar makes the options disappear. What OS are you using?

[taysonvo]

Hi @andrewseguin,
Im using Firefox browser on Windows 10.

[expectpin]

Same here. Using Firefox 57.0.2 on Windows 7.

[crisbeto]

I managed to reproduce it now as well. It looks like Firefox doesn't block the scroll event for overlays with a transparent background.