The problem is somewhere Chrome stopped firing keypress events for "backspace" since Android 4.4. This has been problematic in many webview based apps to catch required events. There is a small relief from this by using the input event that fires whenever user types something, pastes something, or taps on ".com" button in the keyboard, etc.

It is best to rely on input event if you are looking only to capture changes to the input. It is not useful if you want to do preventing default actions.

backSpace not firing the keyup event in android mobileThis is the first time,I am working on mobile Apps.keyUp event not firing If I press backspace button. I made a jsFiddle for reference. Initially user entered 23 and then user deleted 3 using bac...https://stackoverflow.com/questions/22503559/backspace-not-firing-the-keyup-event-in-android-mobile