jquery check if input value has changed dynamically

Question

I have to implement following issue. I have input and i need to show warning message if its value has changed. But for some reasons alert shows few times, can't figure out why. Here was the first question.

$("#input").bind("propertychange change paste input", function(){
    alert("Value has been changed");
});

The second question:

How can i check if input's value has changed dynamically. For example if i click on some element then value changes.

$("a").click(function(){
    $("#input").val("test");
})

Here's a fiddle i've created.

Any ideas? Thanks in advance!

Answer 1

There is no event raised when an inputs value is changed dynamically. Your best option is to manually raise an event upon changing the value:

$("a").click(function(){
    $("#input").val("test").trigger('change');
})