DOMContentLoaded vs load
Written byPhuoc Nguyen
Created
25 Jun, 2020
Category
DOM
#Differences
The
`DOMContentLoaded` event fires when all the nodes in the page have been constructed in the DOM tree.
The `load` event fires when all resources such as images and sub-frames are loaded completely.#Good to know
The
`DOMContentLoaded` event isn't supported in IE 8 and the older versions of IE.To support the behavior in the old versions of IE, we can use the
`readyState` property to check if the document is loaded completely or not:js
const ready = function (cb) {
document.readyState === 'loading'
? // The document is still loading
document.addEventListener('DOMContentLoaded', function (e) {
cb();
})
: // The document is loaded completely
cb();
};The
`ready` function accepts a function that will be invoked when the document is ready:js
ready(function() {
// Do something when the document is ready
...
});
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Phước Nguyễn