javascript w3schools click() code example

Example 1: javascript onclick

document.getElementById("Save").onclick = function ()
    {
     alert("hello");
     //validation code to see State field is mandatory.  
    }

Example 2: javascript onclick button

var button = document.querySelector('button');
button.onclick = function() {
  //do stuff
}

Example 3: javascript click

const element = document.querySelector('element');
element.click();