How I can to make expectation of readiness of full page load on pure JS? $(document).ready equivalent without jQuery. Js document ready. Pure JavaScript equivalent of jQuery document ready.
$(document).ready
Use addEventListener and event DOMContentLoaded.
addEventListener
DOMContentLoaded
Common template:
document.addEventListener("DOMContentLoaded", callback);
Examples:
document.addEventListener('DOMContentLoaded', function() { // ... });
or
document.addEventListener("DOMContentLoaded", function(event) { // ... });