Node.js example with ClojureScript with shadow-cljs

• Shadow-cljs
• Integrate with NPM modules
• ClojureScript cheatsheet

Develop

Install all dependencies.

npm run install

Watch compile with with hot reloading, using the browser target as example.

npm run watch:browser

Start program and connect reload server:

npm run start:browser

Production release

Build production builds for each target.

# Build all targets
npm run release
# or
npm run release:app
npm run release:library
npm run release:browser

Browser

npm run release:browser

This will generate a file inside build/browser/browser-main.js, and copy a static index.html which loads the script.

The browser-main.js file contains your JavaScript logic, so copy that into your server and load it into your main website HTML.

• Browser target

Node application

npm run release:app

Compiles the Node app, :app target, to build/node-app.js.

• Node application target

Library

Apart from the main Node script/app generated, we can also generate a library in the standard commonjs format that can be used in other Node/JavaScript projects, or as a handler in AWS Lambda.

npm run release:library

• Node library target
• Multiple named exports

REPL

Start a REPL connected to current running program, app for the :build-id:

npx shadow-cljs cljs-repl app

Run a script on the command line before building

Using Lumo-cljs allows us to run scripts before fully building with shadow-cljs to test things out.

The lumo -m <ns-namespace> command tries to execute the -main function inside the given <ns-namespace>.

npx lumo -c "src" -m "server.main"

License

MIT