I’ve updated TailwindCSS to v2 on my side project recently and everything works fine so here are my package.json and webpack.config,js files. I’m using PostCSS 8 here. Hope this helps.
package.json
{
“repository”: {},
“description”: " ",
“license”: “MIT”,
“scripts”: {
“deploy”: “webpack --mode production”,
“watch”: “webpack --mode development --watch”
},
“dependencies”: {
“nprogress”: “^0.2.0”,
“phoenix”: “file:…/deps/phoenix”,
“phoenix_html”: “file:…/deps/phoenix_html”,
“phoenix_live_view”: “file:…/deps/phoenix_live_view”
},
“devDependencies”: {
“@babel/core”: “^7.0.0”,
“@babel/preset-env”: “^7.0.0”,
“@tailwindcss/forms”: “^0.2.1”,
“autoprefixer”: “^10.0.2”,
“babel-loader”: “^8.0.0”,
“copy-webpack-plugin”: “^5.1.1”,
“css-loader”: “^3.4.2”,
“cssnano”: “^4.1.10”,
“file-loader”: “^6.2.0”,
“hard-source-webpack-plugin”: “^0.13.1”,
“mini-css-extract-plugin”: “^0.9.0”,
“node-sass”: “^4.13.1”,
“optimize-css-assets-webpack-plugin”: “^5.0.1”,
“postcss”: “^8.1.10”,
“postcss-import”: “^13.0.0”,
“postcss-loader”: “^4.0.4”,
“sass-loader”: “^8.0.2”,
“tailwindcss”: “^2.0.1”,
“terser-webpack-plugin”: “^2.3.2”,
“webpack”: “4.41.5”,
“webpack-cli”: “^3.3.2”
}
}
webpack.config.js
const path = require(‘path’);
const glob = require(‘glob’);
const HardSourceWebpackPlugin = require(‘hard-source-webpack-plugin’);
const MiniCssExtractPlugin = require(‘mini-css-extract-plugin’);
const TerserPlugin = require(‘terser-webpack-plugin’);
const OptimizeCSSAssetsPlugin = require(‘optimize-css-assets-webpack-plugin’);
const CopyWebpackPlugin = require(‘copy-webpack-plugin’);
module.exports = (env, options) => {
const devMode = options.mode !== ‘production’;
return {
optimization: {
minimizer: [
new TerserPlugin({ cache: true, parallel: true, sourceMap: devMode }),
new OptimizeCSSAssetsPlugin({})
]
},
entry: {
‘app’: glob.sync(‘./vendor/**/*.js’).concat([‘./js/app.js’])
},
output: {
filename: ‘[name].js’,
path: path.resolve(__dirname, ‘…/priv/static/js’),
publicPath: ‘/js/’
},
devtool: devMode ? ‘eval-cheap-module-source-map’ : undefined,
module: {
rules: [
{
test: /.js$/,
exclude: /node_modules/,
use: {
loader: ‘babel-loader’
}
},
{
test: /.[s]?css$/,
use: [
MiniCssExtractPlugin.loader,
‘css-loader’,
‘postcss-loader’,
],
},
{
test: /.(woff(2)?|ttf|eot|svg)(?v=\d+.\d+.\d+)?$/,
include: path.resolve(__dirname, ‘./static/fonts’),
use: [
{
loader: ‘file-loader’,
options: {
name: ‘[name].[ext]’,
outputPath: ‘./fonts/’
}
}
]
}
]
},
plugins: [
new MiniCssExtractPlugin({ filename: ‘…/css/app.css’ }),
new CopyWebpackPlugin([{ from: ‘static/’, to: ‘…/’ }])
]
.concat(devMode ? [new HardSourceWebpackPlugin()] : )
}
};