Javascript document ready

JavaScript
document.addEventListener("DOMContentLoaded", function() {
  // code
});// jQuery document ready
$(document).ready(function() {
    
});$( document ).ready(function() {
    console.log( "ready!" );
});
document.addEventListener("DOMContentLoaded", function(event) { 
  //we ready baby
});$( document ).ready(function() {
    console.log( "ready!" );
});window.onload = function() {

};
Source

Also in JavaScript: