* docs(guide/Internet Explorer Compatibility): Mention 'disabled' attribute
Setting the 'disabled' attribute on an element that has descendant elements has unexpected behavior in Internet Explorer 11.
* Input elements that are descendants have the text content of the 'placeholder' attribute inserted as the value (and it is not removed when typing in the field).
* Select elements that are descendants are disabled.
To avoid this issue, it is important to not set `disabled` or `ng-disabled` on an element that has descendant form elements. Normally these should only be used on actual form controls so the issue would not manifest.
The issue can also appear if a directive/component is named 'disabled' or takes an attribute named 'disabled' as an input/output attribute, so avoid these.
Closes #16490
Related #15700
Giuseppe Scoppino
c68b31cb2c