Detect changed input text box

You can use the input Javascript event in jQuery like this:

$('#inputDatabaseName').on('input',function(e){
    alert('Changed!')
});

In pure JavaScript:

document.querySelector("input").addEventListener("change",function () {
  alert("Input Changed");
})

Or like this:

<input id="inputDatabaseName" onchange="youFunction();"
onkeyup="this.onchange();" onpaste="this.onchange();" oninput="this.onchange();"/>

---

try keyup instead of change.

<script type="text/javascript">
   $(document).ready(function () {
       $('#inputDatabaseName').keyup(function () { alert('test'); });
   });
</script>

Here's the official jQuery documentation for .keyup().

---

Each answer is missing some points, so here is my solution:

$("#input").on("input", function(e) { var input = $(this); var val = input.val(); if (input.data("lastval") != val) { input.data("lastval", val); //your change action goes here console.log(val); } });

Try to drag the letters and copy paste

The Input Event fires on Keyboard input, Mouse Drag, Autofill and Copy-Paste tested on Chrome and Firefox. Checking for previous value makes it detect real changes, which means not firing when pasting the same thing or typing the same character or etc.

Working example: http://jsfiddle.net/g6pcp/473/

update:

And if you like to run your change function only when user finishes typing and prevent firing the change action several times, you could try this:

var timerid; $("#input").on("input", function(e) { var value = $(this).val(); if ($(this).data("lastval") != value) { $(this).data("lastval", value); clearTimeout(timerid); timerid = setTimeout(function() { //your change action goes here console.log(value); }, 500); }; });

If user starts typing (e.g. "foobar") this code prevents your change action to run for every letter user types and and only runs when user stops typing, This is good specially for when you send the input to the server (e.g. search inputs), that way server does only one search for foobar and not six searches for f and then fo and then foo and foob and so on.

---

Text inputs do not fire the change event until they lose focus. Click outside of the input and the alert will show.

If the callback should fire before the text input loses focus, use the .keyup() event.

---

onkeyup, onpaste, onchange, oninput seems to be failing when the browser performs autofill on the textboxes. To handle such a case include "autocomplete='off'" in your textfield to prevent browser from autofilling the textbox,

Eg,

<input id="inputDatabaseName" autocomplete='off' onchange="check();"
 onkeyup="this.onchange();" onpaste="this.onchange();" oninput="this.onchange();" />

<script>
     function check(){
          alert("Input box changed");
          // Things to do when the textbox changes
     }
</script>

---

In my case, I had a textbox that was attached to a datepicker. The only solution that worked for me was to handle it inside the onSelect event of the datepicker.

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

$("#bookdate").datepicker({            
     onSelect: function (selected) {
         //handle change event here
     }
});

---