How to make expectation of readiness page load on pure JS?

Question

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.

Answer 1

Use addEventListener and event DOMContentLoaded.

Common template:

document.addEventListener("DOMContentLoaded", callback);

Examples:

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

or

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

Links

• https://stackoverflow.com/questions/799981/document-ready-equivalent-without-jquery