[Demo] jQuery TextBox onChange Event

[Demo] jQuery TextBox onChange Event

by maleol

HTML

<input type="text" id="url">

JavaScript

$('#url').change(function () {
    var url = $('#url').val();
    if (url != undefined || url != "") {
        var regExp = /^.*(youtu.be\/|v\/|u\/\w\/|embed\/|watch\?v=|\&v=|\?v=)([^#\&\?]*).*/;
        var match = url.match(regExp);
        if (match && match[2].length == 11) {
        	 alert('OK');        
        } else {
            alert('NOT OK');
        }
    }
});