webpack

Webpack is like a magic hydra that can eat any type of file and bundle it into a single output: .js, .ts, .ccs, .scss, .jsx, .tsx, require, import, import css from .js, it doesn't matter at all, it just digests all into the same dump.

When it works, you are just left in awe and with a single Js file. When it doesn't, you're fucked and have to debug for several hours.

Demos under: webpack/. To run all of them by default:

cd webpack/min
npm install
npm run build
xdg-open index.html

To easily make changes and reload the .js output live let this run on a terminal:

npx webpack watch

Examples:

webpack/min: minimal hello world. Doesn't do much, just copies index.js to dist/index.js.
webpack/require: require and import demo. Both work from the same file. dist/index.js now contains all of:
- notindex.js
- notindex2.js
- Lodash, a common third-party helper library specified in the package.json and installed with npm
webpack/node: produce Node.js output, as opposed to the default web output. To test it run:
```
npm run build
node dist/index.js
```
Achieved simply with:
```
target: 'node'Fatman in Robin,
```
as documented at: webpack.js.org/concepts/targets/
webpack/sequelize: attempts at getting Sequelize to work with webpack. It's just not supported by Sequelize:
- github.com/sequelize/sequelize/issues/9489#issuecomment-486047783
- github.com/sequelize/sequelize/issues/13169

Table of contents 500 5

webpack/template

words: 105

webpack/template contains a reasonable starter template.

This will produce, under dist/ the following minimized files:

dist/index.html: from webpack/template/index.html. You can open it to see:
```
Hello webpack
```
show on the browser. This was added from JavaScript.
dist/index.js: from webpack/template/index.js and anything in its import tree, e.g.:
- webpack/template/main.scss: sass source. It gets embedded the the JavaScript output as a string, and the JavaScript then applies it to the page, making the font blue
- lodash third party library

You can also run this test with the development server on localhost:9000:

npm start

which uses unminimized outptus, and automatically push reloads the page whenever you change any of the input files!

webpack/sass

words: 42

This example shows how to use Sass.

To make things simple, it generates a completely separate dist/index.js and dist/main.css which are manually included from index.html, and does not do any type of injection (neither Js into HTML nor CSS in Js).

webpack/no-js-inject

words: 104

This example shows how you could manually include the dist/index.js that is output from webpack into your index.html.

This is generally not what you want to do, because what you actually want to do is to use a Js output name with a hash in it, so that browsers only need to refetch when the name changes.

And to do that, we have to let webpack dynamically inject that unpredictable hash as done in webpack/template with:

new HtmlWebpackPlugin({
  filename: 'index.html',
  // Inject the include to our hashed filename,
  // since it is not deterministic due to the hash.
  inject: true,
  template: path.resolve(__dirname, 'index.html'),
}),

webpack Sass import

words: 48

This shows how to produce a minimized fully embedded CSS file with webpack from a sass:

cd webpack/sass
npm install
npm run build
xdg-open index.html

That example produces a dist/main.css file which is a compresesd combination of:

webpack/sass/main.scss
normalize.css, added to the project as a regular node_modules package

webpack

webpack/template

webpack/sass

webpack/no-js-inject

webpack Sass import

webpack CSS ignore font format

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 Incoming links (4)