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webpack.config.js
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webpack.config.js
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const path = require('path');
const merge = require('webpack-merge');
const glob = require('glob');
const CleanObsoleteChunks = require('webpack-clean-obsolete-chunks');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const assets_path = path.join(__dirname, 'app', 'assets');
const common_config = merge([
{
entry: {
main: Array.prototype.concat(
'@babel/polyfill',
glob.sync(path.join(assets_path, 'javascripts', 'src', '*.js')),
path.join(assets_path, 'stylesheets', 'scss', 'main.scss')
)
},
output: {
path: assets_path,
},
module: {
rules: [
{
test: /\.js$/,
loader: 'babel-loader',
exclude: [path.join(__dirname, 'node_modules')],
options: {
presets: ['@babel/preset-env'],
plugins: ['@babel/plugin-transform-runtime'],
},
},
{
test: /\.(sass|scss)$/,
use: [
'file-loader',
'extract-loader',
'css-loader?-url',
'postcss-loader',
'sass-loader'
]
}
]
},
plugins: [
new CleanObsoleteChunks({ verbose: false })
]
}]);
const development_config = merge([
{
devtool: 'cheap-eval-source-map',
stats: 'minimal',
output: {
filename: 'javascripts/compiled/[name].[hash].js',
},
watchOptions: {
poll: true
},
module: {
rules: [
{
test: /\.(sass|scss)$/,
use: [
{
loader: 'file-loader',
options: {
name: 'stylesheets/compiled/[name].[hash].css',
}
},
]
}
]
}
}]);
const production_config = merge([
{
stats: 'errors-only',
output: {
filename: 'javascripts/dist/[name].min.js',
},
module: {
rules: [
{
test: /\.(sass|scss)$/,
use: [
{
loader: 'file-loader',
options: {
name: 'stylesheets/dist/[name].css',
}
},
]
}
]
},
plugins: [
new OptimizeCSSAssetsPlugin(
{
cssProcessor: require('cssnano'),
cssProcessorPluginOptions: {
preset: ['default', { discardComments: { removeAll: true } }],
},
}
),
]
}]);
module.exports = (env, argv) => {
var mode = argv.mode;
switch (mode)
{
case 'development':
return merge.smart({ mode }, common_config, development_config);
case 'production':
default:
return merge.smart({ mode }, common_config, production_config);
}
};