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packup v0.1.11


Zero-config web application packager in Deno.


  • 📦 Bundle web application like Parcel.
  • ✨ Support TypeScript out of the box.
  • 🦕 Deno-compatible ES Modules resolution.
  • 💨 Fast build with esbuild-wasm bundler.


Install via

deno run -A

Write HTML and JavaScript:


    <script src="./main.ts"></script>
    <h1>Hi from packup!</h1>


console.log("hello world");

packup has the development server builtin. Run the following command to start the server.

packup index.html

Then open http://localhost:1234/ in your browser.

See packup serve -h and packup build -h for more usages.


You can type check the script with Deno.

You need the following tsconfig.json for your frontend scripts correctly type checked.

  "compilerOptions": {
    "lib": ["esnext", "dom"]

If you use vscode you need to set ‘deno.config’ property in .vscode/settings.json file to point the tsconfig.json:

  "deno.enable": true,
  "deno.lint": true,
  "deno.unstable": true,
  "deno.config": "./tsconfig.json"

If you’d prefer to use CLI directly to type check your script, you can use the following command for it:

deno cache --config tsconfig.json <script>

See the example repository for more details.

Advanced usages

If you want to use packup without installing globally, you can use the following command.

deno run --allow-env --allow-read --allow-write
deno run -A <your parameters>

The first command ensures the esbuild wasm installed on your machine. The second command is the actual entrypoint of the packup program.

0.2.0 roadmap

  • –public-url
  • twind example
  • Make esbuild.wasm path configurable
  • optimize (minify) option
  • css import support
  • image import support
  • scss @import support

1.0 roadmap

  • import map support
  • sourcemap support

Prior art


  • 2021-12-22 v0.1.11 Add support of image imports (in html). #33
  • 2021-12-05 v0.1.10 Install wasm under DENO_DIR when it’s specified. #31
  • 2021-12-05 v0.1.9 Add logging related to sass.
  • 2021-11-29 v0.1.8 Add --static-dist-prefix option #30
  • 2021-11-29 v0.1.7 Add --public-url option #29
  • 2021-10-21 v0.1.6 CLI start up time improvement
  • 2021-10-20 v0.1.5 Remove the use of unstable flag #28
  • 2021-10-19 v0.1.4 Change esbuild wasm file name.
  • 2021-09-19 v0.1.3 Skip processing http(s):// url references in html #22.
  • 2021-09-17 v0.1.2 Fix -p option.
  • 2021-09-16 v0.1.1 Add ensure_esbuild_wasm.ts entrypoint.
  • 2021-09-15 v0.1.0 Add basic support of scss #18
  • 2021-09-08 v0.0.17 Support multiple entrypoints #14
  • 2021-09-01 v0.0.16 Fix the message when the server starts #11
  • 2021-07-31 v0.0.15 Update iterable_file_server
  • 2021-07-01 v0.0.14 Fix @import-maps/resolve dependency . Remove –bundler options
  • 2021-06-21 v0.0.13 Fix for windows