onchange event for input type=“number”

Question

How can I handle an onchange for ? I can\'t do a keyup or keydown, be

Answer 1

<input type="number" id="n" value="0" step=".5" />
<input type="hidden" id="v" value = "0"/>

<script>
$("#n").bind('keyup mouseup', function () {
    var current = $("#n").val();
    var prevData = $("#v").val(); 
    if(current > prevData || current < prevData){
       $("#v").val(current);
       var newv = $("#v").val(); 
       alert(newv);
    } 
});  
</script>

http://jsfiddle.net/patrickrobles53/s10wLjL3/

I've used a hidden input type to be the container of the previous value that will be needed for the comparison on the next change.

Answer 2

http://jsfiddle.net/XezmB/8/

$(":input").bind('keyup change click', function (e) {
    if (! $(this).data("previousValue") || 
           $(this).data("previousValue") != $(this).val()
       )
   {
        console.log("changed");           
        $(this).data("previousValue", $(this).val());
   }

});


$(":input").each(function () {
    $(this).data("previousValue", $(this).val());
});​

This is a little bit ghetto, but this way you can use the "click" event to capture the event that runs when you use the mouse to increment/decrement via the little arrows on the input. You can see how I've built in a little manual "change check" routine that makes sure your logic won't fire unless the value actually changed (to prevent false positives from simple clicks on the field).

Answer 3

The oninput event (.bind('input', fn)) covers any changes from keystrokes to arrow clicks and keyboard/mouse paste, but is not supported in IE <9.

jQuery(function($) {
  $('#mirror').text($('#alice').val());

  $('#alice').on('input', function() {
    $('#mirror').text($('#alice').val());
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>

<input id="alice" type="number" step="any" value="99">

<p id="mirror"></p>

Answer 4

$("input[type='number']").bind("focus", function() {
    var value = $(this).val();
    $(this).bind("blur", function() {
        if(value != $(this).val()) {
            alert("Value changed");
        }
        $(this).unbind("blur");
    });
});

OR

$("input[type='number']").bind("input", function() {
    alert("Value changed");
});

Answer 5

$(':input').bind('click keyup', function(){
    // do stuff
});

Demo: http://jsfiddle.net/X8cV3/

Answer 6

Because $("input[type='number']") doesn't work on IE, we should use a class name or id, for example, $('.input_quantity').

And don't use .bind() method. The .on() method is the preferred method for attaching event handlers to a document.

So, my version is:

HTML

<input type="number" value="5" step=".5" min="1" max="999" id="txt_quantity" name="txt_quantity" class="input_quantity">

jQuery

<script>
$(document).ready(function(){
    $('.input_quantity').on('change keyup', function() {
        console.log('nice');
    }); 
});
</script>