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webbundle

Web Bundle and Isolated Web App experiments

Install dependencies

Fetch dependencies using package.json

bun install

or

npm install

Programmatically create node_modules folder and add wbn-sign-webcrypto to the folder from the GitHub repository

deno run -A deno_install.js

Dynamically fetch dependencies without creating a node_modules folder and create the .swbn file and IWA.

deno run -A --unstable-byonm --import-map=deno.json index.js

Signed Web Bundle/Isolated Web App source files

Entry point is assets directory; contains manifest.webmanifest, index.html, script.js and any other scripts or resources to be bundled.

Generate private and public keys, write to file system

This only has to be done once.

node --experimental-default-type=module generateWebCryptoKeys.js

Build the Signed Web Bundle and Isolated Web App

Write signed.swbn to current directory

Node.js

node --experimental-default-type=module index.js

Bun

bun run index.js

Deno

deno run --unstable-byonm -A index.js

Install Isolated Web App using Signed Web Bundle

Navigate to chrome://web-app-internals/, click Select file... and select signed.swbn.

Build/rebuild wbn-bundle.js from src/index.ts with bun

try {
  console.log(
    await Bun.build({
      entrypoints: ["./src/index.ts"],
      outdir: ".",
      sourcemap: "external",
      splitting: false,
      target: "bun" // or "node"
      format: "esm",
      // minify: true,
      external: ["mime", "base32-encode", "wbn-sign-webcrypto", "wbn"],
      naming: {
        entry: "[dir]/wbn-bundle.[ext]",
      },
    }),
  );
} catch (e) {
  console.log(e);
}

Dynamically build/rebuild wbn-bundle.js from src/index.ts with esbuild and run

// import bundleIsolatedWebApp from "./wbn-bundle.js";
import * as esbuild from "esbuild";

// Deno-specific workaround for dynamic imports. 
const dynamicImport = "./wbn-bundle.js";

await esbuild.build({
  entryPoints: ["src/index.ts"],
  platform: "node",
  outfile: dynamicImport,
  format: "esm",
  packages: "external",
  legalComments: "inline",
  sourcemap: true,
  bundle: true,
  keepNames: true,
  allowOverwrite: true,
});

// https://github.com/denoland/deno/issues/20945
// "" + "/path" and "/path" + "": Deno-specific workaround to avoid module not found error
 const { default: bundleIsolatedWebApp } = await import(dynamicImport);

Compile index.js to a standalone executable

Deno

Note, this is possible using Deno without node_modules in the current directory, using the import map in deno.json. deno creates a node_modules folder, fetches and populate with the compile dependencies @types/node, undici-types, then compiles and outputs the self-contained executable, 96.8 MB (after strip deno).

 deno compile -A --output deno_webbundle ./index.js

Bun

When node_modules populated with dependencies, creates a 89.1 MB (after strip bun) standalone binary.

bun build ./index.js --compile --outfile=bun_webbundle

TODO

  • This should work in the browser.
  • Install and run using deno without needing to run import the dynamically created bundle wbn-bundle.js twice; the first run throwing module not found error. For now generate and import the bundle twice; the first dynamic import in deno_install.js, catching the error, to avoid the error for first run being thrown in rollup.wbn.js which generates the signed.swbn file. Completed (see this commit).
  • Install wbn-sign-webcrypto dependency from GitHub repository using deno. Completed.
  • Substitute Web Cryptography API for node:crypto. Completed.

License

Do What the Fuck You Want to Public License WTFPLv2