JS Tooling

Script to run through with web tooling

Pre-reqs

If you want to execute any script that uses ES Modules, you'll need to:

Be running Node 13 or above OR use --experimental-modules flag
AND the following to your package.json OR use .mjs file extensions

"type":"module"

Then you're all set

You can also run with:

NODE_OPTIONS=--experimental-vm-module node script.js

Gotchas

Curious "node-gyp" build errors?

They talk about it here.

Try these steps:

# find where the xcode cli tools are installed
xcode-select --print-path

# nuke em
sudo rm -r -f /Library/Developer/CommandLineTools

# reinstall
xcode-select --install

Linting

We'll use eslint. We could also use prettier, which is more for formatting whereas eslint handles both formatting and linting (catching & reparing bugs/syntax issues).

npm install eslint --save-dev
npx eslint <file>
npx eslint --init
# check it out in your IDE

Edit the config

# add...
"no-unused-vars":["off"]

Husky

Husky helps run things as git hooks.

Check their docs.

npm install husky --save-dev

Edit your package.json:

	"pre-commit": "eslint *.js"

Transpiling

We'll use babel to help transpile our "modern js" into "browser friendly old man js".

Let's check the docs to make sure we have everything.

npm install @babel/core @babel/cli @babel/preset-env --save-dev
npx babel <file> --out-file <outfile>
# create a config or copy it from ./configs/babelrc
npx babel

Bundling

We'll use webpack to bundle our code so we can write using ES Modules. Webpack is also a generic runner, which can handle a lot of tasks like compiling CSS, optimizing images, etc.

Visit the webpack site to make sure we have everything.

npm install webpack webpack-cli --save-dev
npx webpack <file>
# see the /dist folder

npx webpack --watch <file>

# add the config from /configs

npx install babel-loader --save-dev
npx webpack

rm-training/lab-tt-js-tooling