imgLazyLoading()

import { imgLazyLoading } from "@unifast/node";

Signature

function imgLazyLoading(options?: ImgLazyLoadingPluginOptions): UnifastPlugin

Parameter

options?

Konfigurasi untuk perilaku lazy loading

Plugin menambahkan atribut loading="lazy" dan decoding="async" pada elemen <img> yang cocok, termasuk gambar yang bersarang di dalam elemen lain.

Penggunaan

import { compile, imgLazyLoading } from "@unifast/node";

const md = `
![Photo 1](photo1.jpg)

![Photo 2](photo2.jpg)

![Photo 3](photo3.jpg)
`;

const result = compile(md, {
  plugins: [imgLazyLoading()],
});

// All images get loading="lazy" and decoding="async":
// <img src="photo1.jpg" alt="Photo 1" loading="lazy" decoding="async">
// <img src="photo2.jpg" alt="Photo 2" loading="lazy" decoding="async">
// <img src="photo3.jpg" alt="Photo 3" loading="lazy" decoding="async">

Contoh

Melewati gambar pertama (pola hero image)

Gambar pertama pada sebuah halaman seringkali merupakan gambar hero atau banner yang harus dimuat secara eager. Gunakan skipFirst untuk mengecualikannya dari lazy loading:

import { compile, imgLazyLoading } from "@unifast/node";

const md = `
![Hero banner](hero.jpg)

Some introductory content...

![Diagram](diagram.jpg)

More content...

![Screenshot](screenshot.jpg)
`;

const result = compile(md, {
  plugins: [
    imgLazyLoading({
      skipFirst: 1,
    }),
  ],
});

// First image loads eagerly (no loading attribute):
// <img src="hero.jpg" alt="Hero banner">
//
// Remaining images are lazy loaded:
// <img src="diagram.jpg" alt="Diagram" loading="lazy" decoding="async">
// <img src="screenshot.jpg" alt="Screenshot" loading="lazy" decoding="async">

Melewati beberapa gambar above-the-fold

import { compile, imgLazyLoading } from "@unifast/node";

const result = compile(md, {
  plugins: [
    imgLazyLoading({
      skipFirst: 3, // skip the first 3 images
    }),
  ],
});