On an input[type='number'] Edge always returns `NaN` for `valueAsNumber`

Question

The following works fine in Chrome and Firefox, however in Edge it will alert NaN no matter the input

Answer 1

Microsoft Edge is having broken behavior on valueAsNumber. This is reported as bug #669685. In addition, setting valueAsNumber yields an InvalidStateException.

This is fixed in Microsoft Edge 17682, currently available in an Windows Insider build.