# What is onsubmit event in JavaScript?

JavascriptWeb DevelopmentFront End Technology

The onsubmit event is an event that occurs when you try to submit a form. You can put your form validation against this event type. The following example shows how to use onsubmit. Here we are calling a validate() function before submitting a form data to the web server. If validate() function returns true, the form will be submitted, otherwise, it'll not submit the data.

## Example

The following example is a code snippet showing the usage of the onsubmit event −

<html>
<script>
<!--
function validation() {
all validation goes here
.........
return either true or false
}
//-->
</script>
</html>