Background: in CJKV environment, it is common that the users input text characters with "composition", while the intermediate state of the buffer is not part of the final text the users want.

For example, if there's a list rendered with ng-repeat and filter:search, and the search scope var is bound to an input field. When the users try to type in the search field, multiple keyup events are fired with unwanted intermediate values. Especially before the second character is typed, the intermediate chars will make the list blank and flashing, as it's unlikely to match any item with the intermediate characters.

The right way to fix this is for textInputType not to update model value between the "compositionstart" and "compositionend" events.

more about composition events: https://developer.mozilla.org/en-US/docs/Web/API/CompositionEvent