Combining tailwind css with sass using webpack - css

Question

I'm struggling a bit getting Tailwind CSS to work with SASS and Webpack. It seems like the postcss configuration for tailwind doesn't really do anything in terms of processing #tailwind preflight, #tailwind components and #tailwind utilities
My set up is as follows:
layout.scss
#import "~tailwindcss/preflight.css";
#import "~tailwindcss/components.css";
.my-class {
#apply text-blue;
#apply border-red;
}
#import "~tailwindcss/utilities.css";
entry.js
import '../css/src/layout.scss';
postcss.config.js
const tailwindcss = require('tailwindcss');
const purgecss = require('#fullhuman/postcss-purgecss');
const cssnano = require('cssnano');
const autoprefixer = require('autoprefixer');
module.exports = {
plugins: [
tailwindcss('./tailwind.js'),
cssnano({
preset: 'default',
}),
purgecss({
content: ['./views/**/*.cshtml']
}),
autoprefixer
]
}
webpack.config.js
// NPM plugins
const autoprefixer = require('autoprefixer');
const WebpackNotifierPlugin = require('webpack-notifier');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');
module.exports = {
entry: {
main: './scripts/entry.js'
},
output: {
filename: '[name].bundle.js',
publicPath: './'
},
watch: false,
externals: {
jquery: 'jQuery'
},
mode: 'development',
plugins: [
// Notify when build succeeds
new WebpackNotifierPlugin({ alwaysNotify: true }),
// Extract any CSS from any javascript file to process it as LESS/SASS using a loader
new MiniCssExtractPlugin({
fileame: "[name].bundle.css"
}),
// Minify CSS assets
new OptimizeCSSAssetsPlugin({}),
// Use BrowserSync plugin for file changes. I.e. if a CSS/SASS/LESS file changes, the changes will be injected directly in the browser with no page load
new BrowserSyncPlugin({
proxy: 'mysite.local',
open: 'external',
host: 'mysite.local',
port: 3000,
files: ['./dist/main.css', './views', './tailwind.js']
},
{
// disable reload from the webpack plugin since browser-sync will handle CSS injections and JS reloads
reload: false
})
],
module: {
rules: [
{
// Transpile ES6 scripts for browser support
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
presets: ['#babel/preset-env']
}
}
},
{
test: /\.(png|jpg|gif|svg|eot|ttf|woff)$/,
use: [
{
loader: 'file-loader'
}
]
},
{
// Extract any SCSS content and minimize
test: /\.scss$/,
use: [
MiniCssExtractPlugin.loader,
{ loader: 'css-loader' },
{
loader: 'postcss-loader',
options: {
plugins: () => [autoprefixer()]
}
},
{
loader: 'sass-loader',
options: {
plugins: () => [autoprefixer()]
}
}
]
},
{
// Extract any CSS content and minimize
test: /\.css$/,
use: [
MiniCssExtractPlugin.loader,
{ loader: 'css-loader', options: { importLoaders: 1 } },
{ loader: 'postcss-loader' }
]
}
]
}
};
When I run Webpack, everything runs just fine, but the content of /dist/main.css is:
#tailwind preflight;#tailwind components;#tailwind utilities;.my-class{#apply text-blue;#apply border-red}
I suspect it's related to the (order of) loaders, but I can't seem to figure out why it's not getting processed correctly.
Does anyone know what I'm doing wrong here? :-)
Thanks in advance.

Answer 1

Wow, so after fiddling around with the loaders even more, I made it work :-) For future reference:
I added options: { importLoaders: 1 } to the css-loader for SCSS files and removed: plugins: () => [autoprefixer()] from the postcss-loader in my webpack.config.js file.
Full, updated webpack.config.js file:
// NPM plugins
const autoprefixer = require('autoprefixer');
const WebpackNotifierPlugin = require('webpack-notifier');
const MiniCssExtractPlugin = require("mini-css-extract-plugin");
const OptimizeCSSAssetsPlugin = require("optimize-css-assets-webpack-plugin");
const BrowserSyncPlugin = require('browser-sync-webpack-plugin');
module.exports = {
entry: {
main: './scripts/entry.js'
},
output: {
filename: '[name].bundle.js',
publicPath: './'
},
watch: false,
externals: {
jquery: 'jQuery'
},
mode: 'development',
plugins: [
// Notify when build succeeds
new WebpackNotifierPlugin({ alwaysNotify: true }),
// Extract any CSS from any javascript file to process it as LESS/SASS using a loader
new MiniCssExtractPlugin({
fileame: "[name].bundle.css"
}),
// Minify CSS assets
new OptimizeCSSAssetsPlugin({}),
// Use BrowserSync plugin for file changes. I.e. if a CSS/SASS/LESS file changes, the changes will be injected directly in the browser with no page load
new BrowserSyncPlugin({
proxy: 'mysite.local',
open: 'external',
host: 'mysite.local',
port: 3000,
files: ['./dist/main.css', './views', './tailwind.js']
},
{
// disable reload from the webpack plugin since browser-sync will handle CSS injections and JS reloads
reload: false
})
],
module: {
rules: [
{
// Transpile ES6 scripts for browser support
test: /\.js$/,
exclude: /node_modules/,
use: {
loader: 'babel-loader',
options: {
presets: ['#babel/preset-env']
}
}
},
{
test: /\.(png|jpg|gif|svg|eot|ttf|woff)$/,
use: [
{
loader: 'file-loader'
}
]
},
{
// Extract any SCSS content and minimize
test: /\.scss$/,
use: [
MiniCssExtractPlugin.loader,
{ loader: 'css-loader', options: { importLoaders: 1 } },
{
loader: 'postcss-loader'
},
{
loader: 'sass-loader',
options: {
plugins: () => [autoprefixer()]
}
}
]
},
{
// Extract any CSS content and minimize
test: /\.css$/,
use: [
MiniCssExtractPlugin.loader,
{ loader: 'css-loader', options: { importLoaders: 1 } },
{ loader: 'postcss-loader' }
]
}
]
}
};

Answer 2

There is an extension called tailwindcss-transpiler which compiles your layout.tailwind.scss files into pure CSS files.It also optimizing features.I hope it will be useful.
For VS Code
https://marketplace.visualstudio.com/items?itemName=sudoaugustin.tailwindcss-transpiler
For Atom
https://atom.io/packages/tailwindcss-transpiler