javascript on form submit code example

Example 1: javascript prevent form submit

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

Example 2: js form submit listener

document.getElementById("#myFormId").addEventListener("submit", function(e){
    if(!isValid){
        e.preventDefault();    //stop form from submitting
    }
  	//do whatever an submit the form
});

Example 3: javascript submit a form

document.getElementById("myFormID").submit();

Example 4: javascript submit form

document.getElementById("myForm").submit();

Example 5: html submit form onclick

var form = document.getElementById("form-id");

document.getElementById("your-id").addEventListener("click", function () {
  form.submit();
});

Example 6: how to run js before submit html

<form onsubmit="return do_something()">

function do_something(){
   // Do your stuff here
   return true; // submit the form

   return false; // don't submit the form
}