Using keydown event and addEventListener you can detect the key, whether it is back or del in JavaScript.
I Will check on the document property, you can also do it with the input filed. Using switch statement for matching conditions.
HTML example code with vanilla JavaScript.
<!DOCTYPE html>
<html>
<body>
<script>
document.addEventListener("keydown", KeyCheck); //or however you are calling your method
function KeyCheck(event)
{
var KeyID = event.keyCode;
switch(KeyID)
{
case 8:
alert("backspace");
break;
case 46:
alert("delete");
break;
default:
break;
}
}
</script>
</body>
</html>Output:
event.key === “Backspace” or “Delete”
input.addEventListener('keydown', function(event) {
const key = event.key; // const {key} = event; ES6+
if (key === "Backspace" || key === "Delete") {
return false;
}
});Do comment if you have any doubts or suggestions on this JS code.
Note: The All JS Examples codes are tested on the Firefox browser and the Chrome browser.
OS: Windows 10
Code: HTML 5 Version