#progressive-enhancement code explainers

typescript

type LazyImageOptions = {
  rootMargin?: string;
  loadedClass?: string;
};

Lazy-loading images with IntersectionObserver

intersectionobserver lazy-loading performance

Intermediate 7 steps

javascript

async function copyToClipboard(text) {
  if (navigator.clipboard && window.isSecureContext) {
    try {
      await navigator.clipboard.writeText(text);

Copying to the clipboard with a fallback

clipboard progressive-enhancement dom

Intermediate 8 steps

javascript

'use server'
 
import { z } from 'zod'
import { redirect } from 'next/navigation'

How a Next.js Server Action validates a form

server-actions form-validation zod

Intermediate 7 steps

javascript

function initLazyLoad(root = document) {
  const images = root.querySelectorAll('img[data-src]');
 
  if (!('IntersectionObserver' in window)) {

How lazy image loading works

lazy-loading intersectionobserver progressive-enhancement

Intermediate 8 steps