how to prevent default form submit code example

Example 1: js stop form submit

<button type="submit" onclick="submitButtonClick(event)">Submit</button>
<script>
function submitButtonClick(event) {
		event.preventDefault();
		//other stuff you want to do instead...
} 
</script>

Example 2: js preventdefault

function(event) {
  event.preventDefault();
}

Example 3: input submit prevent default

$("#cpa-form").submit(function(e){
    return false;
});