Trying to add SASS to a React application - css

Question

I created a brand new React application with create-react-app and now I want to add SASS to it.
I followed the instructions here. Basically I run
npm install node-sass --save-dev
and then added these two lines to my package.json file:
"scripts": {
"build-css": "node-sass src/ -o src/", # Line 1
"watch-css": "npm run build-css && node-sass src/ -o src/ --watch --recursive", # Line 2
"start": "react-scripts start",
"build": "react-scripts build",
"test": "react-scripts test --env=jsdom",
This should do the job, according to the documentation, but when I complete the process doing
mv src/App.css src/App.scss
and then
npm run watch-css
the script just won't finish by itself. I always have to use Ctrl-C to finish it and I believe this is not normal.
My questions are:
Is this normal?
Have I missed something?
If so, what have I missed?

Answer 1

You need to transpile the scss to css for this you can use Webpack or Gulp. I will show you an example for Webpack as I prefer this more. Webpack it takes a while to config you can watch tons of internet tutorials.
In order to transpile scss into css you need to write a loader, in Webpack will be something like this:
module: {
loaders: [
{
test: /\.scss$/,
loader: ExtractTextPlugin.extract(
'style', 'css!sass'
)
},
]
},
This are the packages for the loader, install with npm --S -D sass-loader style-loader into package.json file.
Now in order for Webpack to see the scss files you need to import those files into a js/jsx file for example App.jsx. But to not have a lot of imports you can have a base.scss and you will import other scss fils into it
example import './assets/stylesheets/scss/base.scss';
base.scss contains import to other scss files.
This is just a small introduction to what you must do. You need a little bit more to config Webpack you can search on youtube for that or This github link will help you alot!
Gulp is similar you write tasks, as far as I know there is gulp-scss package.