Difference between load vs DOMContentLoaded [duplicate]

Answer 1

• DOMContentLoaded - the whole document (HTML) has been loaded.
• load - the whole document and its resources (e.g. images, iframes, scripts) have been loaded.

Answer 2

DOMContentLoaded awaits only for HTML and scripts to be loaded.
window.onload and iframe.onload triggers when the page is fully loaded with all dependent resources including images and styles.

Here is more details you can find http://javascript.info/tutorial/onload-ondomcontentloaded