Use the return value of the function to stop the execution of a form in JavaScript.
<form onsubmit = "event.preventDefault(); myValidation();">
The JavaScript function would be like the following −
function myValidation() { if(check if your conditions are not satisfying) { alert("Oops! Validation failed!"); returnToPreviousPage(); return false; } alert("Validations successful!"); return true; }
False would return if the form fails to submit.