Cloudflare Workers HTMLRewriter polyfill

🚀 HTMLRewriter packaged to work everywhere

RTFill website | Docs website | ⚡ StackBlitz playground | Cloudflare Workers HTMLRewriter docs

✍ Perfect for transforming HTML streams
✅ Works in Node.js, [Deno], [Vercel], [Netlify], and browsers
🟪 Built with [WebAssembly] for [big performance gains]
⚡ Exposes the native HTMLRewriter in [Bun] and [Cloudflare Workers]
😂 Built on [cloudflare/lol-html], the HTML stream parser that powers the native HTMLRewriter
📦 Uses new URL("big.wasm", import.meta.url) so your bundler includes the .wasm file

Installation

npm install @rtfill/workerd-html-rewriter

import HTMLRewriter from "npm:@rtfill/workerd-html-rewriter";
import HTMLRewriter from "https://esm.sh/@rtfill/workerd-html-rewriter";
import HTMLRewriter from "https://esm.run/@rtfill/workerd-html-rewriter";

import HTMLRewriter from "https://esm.run/@rtfill/workerd-html-rewriter";
import HTMLRewriter from "https://esm.sh/@rtfill/workerd-html-rewriter";

Usage

import HTMLRewriter from "@rtfill/workerd-html-rewriter";

const oldResponse = await fetch("https://nodejs.org/");
const newResponse = new HTMLRewriter()
  .on("a", {
    element(e) {
      console.log(e.getAttribute("href"));
      e.setAttribute("href", "https://python.org/");
    },
  })
  .transform(oldResponse);
const text = await newResponse.text();
console.log(text);

import "@rtfill/workerd-html-rewriter/polyfill.js";
console.log(new HTMLRewriter());