keyup not working on Chrome on Android

Question

I am using bootstrap typeahead.

It depends on this jQuery code to work:

el.on('keyup', doSomething() )

On Chrome on Windows it works fine. On Chrome on Android it doesn't. The keyup event is never fired. The element to which it is bound definitely has the focus.

This appears to be a recent development.

Chrome 28.0.1500.64 Android 4.1.2 SGP321 Build/10.1.1.A.1.307

Thanks

--Justin Wyllie

Answer 1

I came across this same problem earlier today. How can android chrome not support these key events! I assume you've found a workaround by now, but here's a fix that I came up with for now.

function newKeyUpDown(originalFunction, eventType) {
    return function() {
        if ("ontouchstart" in document.documentElement) { // if it's a touch device, or test here specifically for android chrome
            var $element = $(this), $input = null;
            if (/input/i.test($element.prop('tagName')))
                $input = $element;
            else if ($('input', $element).size() > 0)
                $input = $($('input', $element).get(0));

            if ($input) {
                var currentVal = $input.val(), checkInterval = null;
                $input.focus(function(e) {
                    clearInterval(checkInterval);
                    checkInterval = setInterval(function() {
                        if ($input.val() != currentVal) {
                            var event = jQuery.Event(eventType);
                            currentVal = $input.val();
                            event.which = event.keyCode = (currentVal && currentVal.length > 0) ? currentVal.charCodeAt(currentVal.length - 1) : '';
                            $input.trigger(event);
                        }
                    }, 30);
                });
                $input.blur(function() {
                    clearInterval(checkInterval);
                });
            }
        }
        return originalFunction.apply(this, arguments);
    }
}
$.fn.keyup = newKeyUpDown($.fn.keyup, 'keyup');
$.fn.keydown = newKeyUpDown($.fn.keydown, 'keydown');