how to stop submit action in javascript code example

Example 1: javascript prevent form submit

<form name="foo" onsubmit="return false">

Example 2: prevent form submission on onsubmit function calls

returning false here won't be executed and the form will be submitted either way. You should also call preventDefault to prevent the default form action for Ajax form submissions.

function mySubmitFunction(e) {
  e.preventDefault();
  someBug();
  return false;
}

Get more references : https://stackoverflow.com/questions/3350247/how-to-prevent-form-from-being-submitted

Example 3: javascript do not submit form

alert("hello world");
alert("it is a test");

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