lazyload-webpack-plugin

A webpack plugin for adding loading="lazy"into all <img> and <iframe> in HtmlWebpackPlugin pages. If NOT all of the target browsers supports loading attribute, then fallback to lazysizes.

Note: This is an extension plugin for html-webpack-plugin, and only work with html-webpack-plugin@5+.

Usage

First, install this package as a dependency in your package.json:

$ npm i -D lazyload-webpack-plugin

Next, use it in your Webpack config:

const HtmlWebpackPlugin = require('html-webpack-plugin');
const LazyLoadWebpackPlugin = require('lazyload-webpack-plugin');

module.exports = {
  plugins: [
    new HtmlWebpackPlugin(),
    new LazyLoadWebpackPlugin({
      // you can use other lazyload library which support the same API
      lazyloadLib: 'https://LIB_URL',
    }),
  ],
}

You can avoid adding loading="lazy" to all <img> and <iframe> by specifically adding loading to the <img> and <iframe> tag you don't want to.

Pre-requisites

This module requires Webpack@5+, and html-webpack-plugin@5+.

Introduction

As @addyosmani said in his twitter,

Native lazy-loading is coming to the web! https://t.co/LgF7F1iMgR defers offscreen images until the user scrolls near them. Shipping in Chrome ~75 https://t.co/4gR7lvx4zx

— Addy Osmani (@addyosmani) April 7, 2019

Chrome/Edge/Firefox support loading="lazy" in <img> and <iframe> to turn on native lazy-load.

Then I think I can do this via a webpack plugin, adding this attribute to all <img>s and <iframe>s.

TODO

1. Add support for other lazy-loading methods.
2. Support customization lazyload fallback function

Author

Meathill (Lujia Zhai) <meathill@gmail.com>

I'm a developer live in Guangzhou, China.

License

MIT