.onchange in javascript code example
Example 1: onchange js
<script>
document.getElementById("fname").addEventListener("change", myFunction);
function myFunction() {
var x = document.getElementById("fname");
x.value = x.value.toUpperCase();
}
</script>
Example 2: js html textbox on change
<input type="text" onkeydown="keydownFunction()"
onkeyup="keyupFunction()" onchange="changeFunction()">
Example 3: on change event html not working
onchange is only triggered when the control is blurred. Try onkeypress instead.