fix(input): update $viewValue when cleared

[wesleycho]

• Fix when user clicks clear button in an input element in IE, $viewValue not being correctly updated

This should fix #11193.

[Narretz]

Cool! I believe writing a test is difficult because we can't click the clear button?

[wesleycho]

Yeah - fussing around with this a bit to get the right condition currently, but I think the right fix might be attainable here.

[wesleycho]

This is a little tough - so falsy model changes will convert to the empty string, so this potentially breaks some behavior. Any ideas on good workarounds for that situation?

[wesleycho]

There are some complicated scenarios I'm having trouble figuring out a good solution to.

Here is an incomplete table:

Initial view value	Initial model value	View value after view change	Model value after model change	Erroneous IE input events	Run $parsers/$validators
''	undefined	''	N/A	false	true
''	null	''	N/A	false	true
''	null	N/A	''	false	true
''	undefined	N/A	N/A	true	false

[gkalpak]

Wouldn't it be easier to just add an extra listener on IEs:

element.on('??mousedown/mouseup/click??', function(event) {
  deferListener(event, this, this.value);
});

[Narretz]

@wesleycho Do you still want to work on this?

[wesleycho]

Don't have the bandwidth anymore :( .

[blemaire]

What's the status on this issue (not doubt i'm not the only one encountering this) Thanks

[gkalpak]

It has been abandoned (afaict) :grin: If anyone wants to take it over, we will be more than happy to offer guidance and reviews, but I don't think we have the resources to take it over, given that we have less than a month of active feature development before entering LTS.