Find workaround setSelectionRange with number inputs (ff 51+)

[mickmcgrath13]

FF 51.0.1+ throws and error when trying to use setSelectionRange on a number input.

Line that causes the error: https://github.com/bitovi/syn/blob/master/src/key.js#L310

Firefox Bug Reported: https://bugzilla.mozilla.org/show_bug.cgi?id=1339154

[mickmcgrath13]

Update: Reported Firefox bug might not be a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1333737

It specifies here and here.

Explained via w3.org comment here.

..still need a workaround, though

[justinbmeyer]

The only work around will be to not update the cursor position. This means that keying left or right will not work. Lame ...

[justinbmeyer]

Related whatwg/html#2358

[justinbmeyer]

It seems the only recourse is to maintain an internal model of what the typing would result in and update the value and events accordingly.

[chasenlehara]

@kdillon and I paired on this issue because this test is failing in Firefox right now.

For now, we’re changing this line to test for undefined and null, since selectionStart will be null in Firefox.

I don’t know if we still want to pursue a “workaround” for something that isn’t guaranteed by the spec. 😕

[chasenlehara]

Closing this because I think it’s “fixed” with #124