DOM - Ready event (Readiness|readyState)

A page in a ready state, all images are not finished downloading, including banner ads.

The readyNess can be read in the readyState property of the document

document.readyState

complete

The document.readyState property returns:

• loading while the Document is loading, (ie if the document is associated with an HTML parser, an XML parser, or an XSLT processor)
• interactive once it is finished parsing but still loading sub-resources,
• and complete once it has loaded.

The readystatechange event fires on the Document object when this value changes.

Timeline Event Reference

Same as Browser - DOMContentLoaded event (page load) ?

window.addEventListener('DOMContentLoaded', function () {
  console.log("It's ready!")
})

To run code as soon as the document is ready to be manipulated in Javascript - JQuery with the Ready event

$( document ).ready(function() {
 
    // Your code here.
 
});