Browser

Source: src/Cloudflare/Workers/Browser.ts

A Cloudflare Browser Rendering binding for launching headless browser sessions from Workers — a Worker-only binding with no backing cloud resource.

Browser is a single value that is at once the Binding.Service tag, the callable that produces a {@link BrowserBinding}, and the type. Declare it on a Worker’s env (it flows through InferEnv → cf.BrowserRun) or yield* it inside an Effect-native Worker to attach the binding and obtain the {@link BrowserClient}.

Effect-style Worker (recommended)

import * as Effect from "effect/Effect";

Cloudflare.Worker(
  "BrowserWorker",
  { main: import.meta.url },
  Effect.gen(function* () {
    const browser = yield* Cloudflare.Browser("BROWSER");

    return {
      fetch: Effect.gen(function* () {
        return yield* browser.markdown({ url: "https://example.com" });
      }),
    };
  }).pipe(Effect.provide(Cloudflare.Workers.BrowserBinding)),
);

Worker binding metadata

export const Worker = Cloudflare.Worker("Worker", {
  main: "./src/worker.ts",
  env: { BROWSER: Cloudflare.Browser() },
});

export type WorkerEnv = Cloudflare.InferEnv<typeof Worker>;
//   { BROWSER: BrowserRun }