Extracting sass as css using webpack - javascript

First. I know questions like this were asked, but I am missing something to understand them. I am trying to compile scss to css. And I would like webpack to basically do the same as sass app.scss : app.css. I tried to configure it using extract-text-webpack-plugin, but I am doing something wrong or missing smth.
It worked if I include(app.scss) in app.js but this makes no sense because if anyone has disabled JavaScript the styles won't work.
This is my webpack.config.js file. I have no idea how to do it.
const webpack = require("webpack");
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var jsConfig = {
entry: "./_dev/scripts/app.js",
output: { filename: "./scripts/bundle.js" },
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
loader: "babel-loader"
}
]
}
};
var scssConfig = {
entry: "./_dev/scss/app.scss",
output: { filename: "./content/app.css" },
module: {
rules: [
{
test: /\.scss$/,
use: ExtractTextPlugin.extract({
fallback: "style-loader",
use: "css-loader"
})
}
]
},
plugins: [
new ExtractTextPlugin({filename:"./_dev/scss/app.scss"}),
]
};
var config = [scssConfig, jsConfig];
module.exports = config;
Edit: I also found this. This series would have helped with all my questions so if you have similar questions make sure to read it before asking!
https://codeburst.io/simple-beginner-guide-for-webpack-2-0-from-scratch-part-v-495dba627718

You need to include your app.scss for webpack to be able to find your scss references because webpack will traverse your project and apply loaders to all files it can find through references starting from app.js recursively down. If you don't have references to app.scss somewhere in the project webpack can't find it and it won't build it. So in the entry of you project (assume it is app.js) you need to do this:
import 'relative/path/to/styles/app.scss';
But it doesn't mean that those who don't have js enabled won't receive your styles. You need to include app.scss only for the build phase of your project, after that your styles will be included in html and will be loaded even for those without js enabled.
webpack concepts section explains how webpack finds dependencies based on your entry point building its internal graph of dependencies.
Update:
There is a way that allows you to not add your app.scss in your js. You can include multiple files in your entry object in your webpack config. Here is an example of how configuration might look in your case:
const webpack = require("webpack");
const ExtractTextPlugin = require("extract-text-webpack-plugin");
var config = {
entry: {
main: [
"./_dev/scripts/app.js",
"./_dev/scss/app.scss"
],
},
output: {
path: './scripts',
filename: "bundle.js"
},
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
loader: "babel-loader"
},
{
test: /\.(css|scss)/,
use: ExtractTextPlugin.extract({
fallback: "style-loader",
use: ['css-loader', 'sass-loader']
})
}
]
},
plugins: [
new ExtractTextPlugin("./_dev/scss/app.scss"),
]
};
module.exports = config;
More information available on SO question webpack-multiple-entry-points-sass-and-js.
You also have incorrect configuration of ExtractTextPlugin in webpack. You are placing the whole path in the option for filename, which is not correct. In your case it should look like this:
plugins: [
new ExtractTextPlugin("./_dev/scss/app.css"),
]

Related

Webpack output bundle larger than expected

The only thing I have in my entry JS file is:
import $ from 'jquery';
The jQuery JS file has the size of 29.5kb from jsdelivr.
My entry, that only includes jQuery, and nothing else, has the size of 86kb.
webpack.config.js
const path = require('path');
const ExtractTextPlugin = require("extract-text-webpack-plugin");
const UglifyJsPlugin = require('uglifyjs-webpack-plugin')
module.exports = {
entry: './src/js/scripts.js',
output: {
publicPath: "./dist/",
path: path.join(__dirname, "dist/js/"),
filename: "bundle.js"
},
watch: true,
module: {
rules: [
{
test: /\.js$/,
exclude: /node_modules/,
loader: "babel-loader",
query: {
presets: [
['env', { loose:true, modules:false }],
'stage-2'
],
plugins: [
['transform-react-jsx', { pragma:'h' }]
]
}
},
{
test: /\.pug$/,
use: [
"file-loader?name=[name].html&outputPath=../dist",
"extract-loader",
"html-loader",
"pug-html-loader"
]
},
{
test: /\.scss$/,
use: ExtractTextPlugin.extract({
use: ['css-loader?url=false', 'sass-loader']
})
},
]
},
resolve: {
alias: {
"TweenMax": path.resolve('node_modules', 'gsap/src/uncompressed/TweenMax.js'),
"TimelineMax": path.resolve('node_modules', 'gsap/src/uncompressed/TimelineMax.js'),
"animation.gsap": path.resolve('node_modules', 'scrollmagic/scrollmagic/uncompressed/plugins/animation.gsap.js'),
}
},
plugins: [
new ExtractTextPlugin('../css/main.css'),
new UglifyJsPlugin({
test: /\.js($|\?)/i
})
],
stats: {
warnings: false
}
};
I should also mention, that going into the output bundle.js it still has the jQuery comments.
jQuery JavaScript Library v3.3.1
https://jquery.com/ ...
Even though I'm calling webpack with the -p argument and have the UglifyJS plugin, but the rest of the file is minified and mangled. Any ideas?
Thanks!
Try to copy and paste minified jquery from your link. It's has size of 86.9 kb.
This link also show that jquery v3 minified file size is also around 80kb.
So you already have correct setup. Maybe your 29.5kb file size is minified+gzipped file.
The 29.5kb file size is definitely the minified+gzipped version as per the link Niyoko posted.
I would also recommend checking out Fuse-Box It brought down our project size from over 1mb to under 200kb (Vendor and App bundles combined). Very easy to get going as well and it is TypeScript first :) It takes the best features from a number of the more popular bundlers and brings them together and builds on those features.

Is there a way to build scss files into css with webpack 4

I'm just trying out Webpack 4 and I was wondering if it had a built-in way to manage Scss files since ExtractTextPlugin doesn't work.
In Webpack 4 you also need to use extract-text-webpack-plugin in order to extract text from bundles. The problem is that stable version isn't compatible with the new plugin system. The team is working on it, but in the meantime you need to install the v4.0.0-beta.0 version.
yarn add extract-text-webpack-plugin#next --dev
You can also check this webpack-demo on GitHub with more configs.
The use on webpack.config.js script remains the same:
const ExtractTextPlugin = require('extract-text-webpack-plugin');
module.exports = {
// ...
module: {
rules: [
{
test: /.scss$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: [
{
loader: 'css-loader',
options: {
modules: true,
camelCase: 'dashes',
minimize: true
}
},
{
loader: 'sass-loader'
}
]
})
}
]
},
plugins: [
new ExtractTextPlugin('[name].[chunkhash].css')
]
}

React reusable component library styles not loading

hey people I need help with the following:
am creating React UI component library
I am using webpack and dev build works great, scss files are loaded and components are displayed correctly
on production build, JS bundle is created as well as CSS (I use SCSS) bundle
BUT when I install the library in another React project and import the component, CSS is not loaded (cmp is not styled), JS works fine and the component is rendered yet styles are not loaded...
EDIT
Apparently this approach requires manual loading of CSS in parent app project. Which I want to avoid. Is there alternative way which can provide scenario in which styles will be resolved on the level on component without need for manual loading?
Here is my production webpack config:
const path = require('path');
const ExtractTextPlugin = require('extract-text-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
module.exports = {
entry: './src/index.js',
output: {
filename: 'bundle.js',
path: path.join(__dirname, '../lib'),
libraryTarget: 'commonjs',
},
module: {
rules: [
{
test: /\.css$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader']
})
},
{
test: /\.scss$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'sass-loader']
})
},
{
test: /\.js$/,
exclude: /node_modules/,
loader: "babel-loader"
},
{
test: /\.svg/,
use: {
loader: 'svg-url-loader',
options: {}
}
}
]
},
externals: {
'react': 'commonjs react',
'react-dom': 'commonjs react-dom',
},
resolve: {
modules: [
path.resolve('./src'),
path.resolve('./node_modules')
]
},
plugins: [
new ExtractTextPlugin({
filename: 'ui-library.css'
})
]
};
You could simply not use ExtractTextPlugin.
The whole purpose of Webpack is to group assets not based on file type but by a component perspective.
So, if you remove ExtractTextPlugin, your CSS will be included in your .js bundle.

Combining SCSS and CSS Into A Single File With WebPack

I'm a newbie to webpack and I'm having trouble understanding how I can take a bunch of scss files and css files and merge them together with webpack (After transpiling the sass of course).
With gulp, it was really obvious, as I can have 1 step the transpile the sass to css and then a step after that to concatenate them together.
However with webpack, it looks like everything happens at the same time.
This is a pretty basic requirement that I'm sure has an obvious answer to those more experienced.
I've got to the point where I can successfully output a transpiled scss to css and seperately output a css file from css input, but I can't figure out how to stick them together using webpack.
Below is my webpack.config.js file:
const path = require('path');
const webpack = require('webpack');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
const extractCSS = new ExtractTextPlugin('extractedCSS.css');
const extractSass = new ExtractTextPlugin({
filename: "extractedSASS.css",
disable: process.env.NODE_ENV === "development"
});
module.exports = function (env) {
return {
context: path.resolve(__dirname, './wwwroot/app'),
entry: {
main: './index.js',
vendor: 'moment'
},
output: {
filename: '[name].[chunkhash].js',
path: path.resolve(__dirname, './wwwroot/mytempdist')
},
module: {
rules: [{
test: /\.css$/,
use: extractCSS.extract({
use: 'css-loader'
})
},
{
test: /\.scss$/,
use: extractSass.extract({
use: [{
loader: "css-loader"
}, {
loader: "sass-loader"
}],
// use style-loader in development
fallback: "style-loader"
})
}
]
},
plugins: [
new webpack.optimize.CommonsChunkPlugin({
name: 'vendor',
minChunks: function (module) {
// this assumes your vendor imports exist in the node_modules directory
return module.context && module.context.indexOf('node_modules') !== -1;
}
}),
//CommonChunksPlugin will now extract all the common modules from vendor and main bundles
new webpack.optimize.CommonsChunkPlugin({
name: 'manifest' //But since there are no more common modules between them we end up with just the runtime code included in the manifest file
}),
//new webpack.optimize.UglifyJsPlugin({
// sourceMap: options.devtool && (options.devtool.indexOf("sourcemap") >= 0 || options.devtool.indexOf("source-map") >= 0)
//}),
extractSass,
extractCSS
],
devtool: 'inline-source-map'
}
}
How can I modify the above to make both the sass and css go into the file css output file?
Incase it makes a difference, below is an exerpt from my index.js file (entry point) toastr is an npm package and pace is just a normal downloaded css file:
var toastr = require('toastr');
import 'toastr/toastr.scss';
import pace from './../lib/pace/pace.min.js';
import './../lib/pace/pace.css';
You have 2 instances of ExtractTextPlugin defined with explicit names and you use those separate instances to load css and scss files respectively.
What you need is only 1 instance of the plugin which will accumulate all the CSS and only one rule for both scss and css files.
{
test: /\.s?css$/,
use: ExtractTextPlugin.extract({
fallback: 'style-loader',
use: ['css-loader', 'sass-loader']
})
}
This will handle both scss and css files and put it all in one single output CSS file.

webpack - compile every scss to css file with same name

I'd like to have structure like this
-Styles
--Main.scss
--SomeComponent.scss
-CompiledStyles
--Main.css
--SomeComponent.css
Actually I can only do this
-Styles
--Main.scss
--SomeComponent.scss
--All.scss (import all scss from file)
-CompiledStyles
--Main.css ( all css)
This is my webpack config
var Path = require('path');
var ExtractTextPlugin = require('extract-text-webpack-plugin');
var extractCSS2 = new ExtractTextPlugin('[name].css');
module.exports = {
devtool: 'eval',
entry: './Client/Styles/All.scss',
output: {
path: Path.join(__dirname, 'CompiledStyles'),
filename: 'page.js',
publicPath: '/CompiledStyles/'
},
module: {
loaders: [
{
test: /\.scss$/,
loader: extractCSS2.extract("style-loader", "css-loader!autoprefixer-loader!sass-loader")
},
{
//IMAGE LOADER
test: /\.(jpe?g|png|gif|svg)$/i,
loader: 'file-loader'
},
{
test: /\.(ttf|otf|eot|svg|woff(2)?)(\?[a-z0-9]+)?$/,
loader: 'file-loader?name=fonts/[name].[ext]'
}
]
},
plugins: [
extractCSS2
]
};
Is it possible to compile this scss files to single css files ?
I really don't know how to manage this case. I've tried to assign entry: './Client/Styles' but it occures error.
EDIT:
I solved this with gulp.
The idea of webpack is to put everything that is needed in some JavaScript-files. So it's the intention to not build a css-file for every css-file.
If you want to still use webpack, try this in your webpack config:
module.exports = {
// ...
entry: {
'Main': './Client/Styles/Main.scss',
'SomeComponents': './Client/Styles/SomeComponents.scss',
},
// ...
}
I have updated the answer after adamo94 noted that he used gulp, so just for everybody else some more information. To convert scss files you need a sass/scss-processor. You can easily call that processor with a single call but as you usually do more with your sources it's likely to use some further processing.
Usually you would use gulp or grunt. Those can be configured to build everything that you need. They have different pros and cons, there are also further tools, but those are probably the ones that you'd like to take a look.

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