how to call javascript function in document.ready code example

Example 1: dom ready js

document.addEventListener("DOMContentLoaded", function() {
  // code
});

Example 2: document ready without jquery

document.addEventListener("DOMContentLoaded", function(event) { 
  //we ready baby
});

Example 3: document. ready

$( document ).ready(function() {
    console.log( "ready!" );
});