Advanced Lazy Loader using Intersection Observer API
lozad.js is a light-weight library to lazy load elements using JavaScript.
It is written with an aim to lazy load images, ads, videos or any other element using the recently added Intersection Observer API with tremendous performance benefits.
lozad.js is just 569 bytes minified & gzipped. It has NO DEPENDENCIES :).
- Yarn:
yarn add lozad - NPM:
npm install lozad - Bower:
bower install lozad - Download zip
Note: lozad.js supports AMD and commonJS module pattern out of the box.
new Lozad(); // lazy loads images with selector class as 'lozad'
with custom options:
new Lozad({
selectorClass: 'lozad', // for identification of images to lazy load
rootMargin: '10px 0px', // syntax similar to that of CSS Margin
threshold: 0.1 // ratio of image convergence
})
Reference:
give custom function definition to load element:
// Initialize Lozad
let lozad = new Lozad();
lozad.load = function(el) {
console.log('loading element');
// Custom implementation to load an element
// e.g. el.src = el.dataset.src;
}
Available in latest browsers. If browser support is not available, then make use of this polyfill.
Interested in contributing features and fixes?
See the Changelog
Copyright (c) 2017 Apoorv Saxena, https://apoorv.pro Licensed under the MIT license.