简短的摘要:
我注意到在本地测试时,我的 webpack 的 dev/prod 配置之间存在小的样式差异。它似乎与 sass-loader 有关,但它可能会扩展到此之外?我不能确定,因为很难找到这个错误。
(底部的代码,图像只是为了突出某些元素)
线索
大多数在开发中丢失或被覆盖的样式都来自我的 Sass 文件。因此,我认为罪魁祸首隐藏在我如何处理 prod.config.js 与 dev.config.js 上的 Sass 文件的某个地方。具体来说,我注意到像 $main-font 这样的 Sass 变量在 dev 上没有被解释,但在 prod 配置上似乎没问题。我还注意到一些奇怪的覆盖发生,其中 dev 可能从一组类应用了边框,但生产没有。也许 Minicssextract 正在为 prod 做一些不同的事情?
问题
在下图中,左边是我的生产配置。正如您所看到的,它将文本提取到在 index.html 中调用的 CSS 文件中。它可以很好地加载我的 SCSS 变量。在右边,我不使用 minicssextractloader,我所有的样式都被放入标签并注入。它将字体系列切换到我在代码中任何地方都没有定义的东西?
装载机
想法和测试:
- Style-loader:我尝试从 scss 测试中删除 dev 上的 postcss、sass-loader 和 style-loader。似乎没有解决问题。
- webpack 是否有可能在开发/生产模式之间做一些时髦的事情?
- 也许我对 prod 的 css 压缩让事情变得很奇怪?
开发配置
const webpack = require('webpack');
const path = require('path');
const fs = require('fs');
require('babel-polyfill').default;
const PATHS = {
app: path.join(__dirname, '../src'),
build: path.join(__dirname, '../dist'),
};
module.exports = {
devtool: 'cheap-module-eval-source-map',
entry: ['webpack-hot-middleware/client', './src/index'],
mode: 'development',
output: {
publicPath: '/dist/',
filename: 'bundle.js',
},
resolve: {
extensions: ['.jsx', '.js', '.json', '.scss', '.less'],
modules: ['node_modules', PATHS.app],
},
module: {
rules: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
loader: 'babel-loader',
},
{
test: /\.css$/,
exclude: /node_modules/,
use: [
{
loader: 'style-loader',
},
{
loader: 'css-loader',
options: {
importLoaders: 1,
},
},
'postcss-loader',
],
},
{
test: /\.(sa|sc|c)ss$/,
use: [
'style-loader',
{
loader: 'css-loader',
options: {
importLoaders: 2,
},
},
'postcss-loader',
'sass-loader',
],
},
{
test: /\.less$/,
use: [
'style-loader',
{
loader: 'css-loader',
options: {
importLoaders: 2,
},
},
'postcss-loader',
'less-loader',
},
],
},
{
test: /bootstrap-sass\/assets\/javascripts\//,
use: [
{
loader: 'imports-loader',
options: {
jQuery: 'jquery',
},
},
],
},
{
test: require.resolve('jquery'),
use: [
{
loader: 'expose-loader',
options: '$',
},
{
loader: 'expose-loader',
options: 'jQuery',
},
],
},
{
test: /\.(woff|woff2)(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 50000,
mimetype: 'application/font-woff',
},
},
],
},
{
test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'application/octet-stream',
},
},
],
},
{
test: /\.otf(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'application/font-otf',
},
},
],
},
{
test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'file-loader',
},
],
},
{
test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'image/svg+xml',
},
},
],
},
{
test: /\.png$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
{
test: /\.jpg$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
{
test: /\.ico$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
],
},
plugins: [
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: '"development"',
},
__DEVELOPMENT__: true,
}),
new webpack.HotModuleReplacementPlugin(),
new webpack.ProvidePlugin({
jQuery: 'jquery',
}),
],
};
产品配置
const webpack = require('webpack');
const path = require('path');
const fs = require('fs');
require('babel-polyfill').default;
// const PurifyCSSPlugin = require('purifycss-webpack');
const CleanWebpackPlugin = require('clean-webpack-plugin');
const StatsPlugin = require('stats-webpack-plugin');
const OptimizeCSSAssetsPlugin = require('optimize-css-assets-webpack-plugin');
const UglifyJsPlugin = require('uglifyjs-webpack-plugin');
const MiniCssExtractPlugin = require('mini-css-extract-plugin');
const cssnano = require('cssnano');
const PATHS = {
app: path.join(__dirname, '../src'),
build: path.join(__dirname, '../dist'),
};
const pathsToClean = [
'../dist/*.{js,css,eot,woff,woff2,svg,ttf,jpg,map}',
'../dist/index.html',
];
const cleanOptions = {
root: PATHS.build,
exclude: [
'sitemap.xml',
],
dry: false,
};
module.exports = {
// devtool: 'source-map',
entry: ['./src/index'],
mode: 'production',
output: {
publicPath: '/dist/',
chunkFilename: '[name].[chunkhash:4].js',
filename: '[name].[chunkhash:4].js',
},
resolve: {
extensions: ['.jsx', '.js', '.json', '.scss', '.less'],
modules: ['node_modules', PATHS.app],
},
module: {
rules: [
{
test: /\.jsx?$/,
exclude: /node_modules/,
loader: 'babel-loader',
},
{
test: /\.css$/,
exclude: /node_modules/,
use: [
{
loader: 'style-loader',
},
{
loader: 'css-loader',
options: {
importLoaders: 1,
},
},
'postcss-loader',
],
},
{
test: /\.(sa|sc|c)ss$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
},
{
loader: 'css-loader',
options: {
importLoaders: 2,
},
},
'postcss-loader',
'sass-loader',
],
},
{
test: /\.less$/,
use: [
{
loader: MiniCssExtractPlugin.loader,
},
{
loader: 'css-loader',
options: {
importLoaders: 2,
},
},
'postcss-loader',
'less-loader',
},
],
},
{
test: /bootstrap-sass\/assets\/javascripts\//,
use: [
{
loader: 'imports-loader',
options: {
jQuery: 'jquery',
},
},
],
},
{
test: require.resolve('jquery'),
use: [
{
loader: 'expose-loader',
options: '$',
},
{
loader: 'expose-loader',
options: 'jQuery',
},
],
},
{
test: /\.(woff|woff2)(\?v=\d+\.\d+\.\d+)?$/,
// test: /\.woff(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 50000,
mimetype: 'application/font-woff',
},
},
],
},
{
test: /\.ttf(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'application/octet-stream',
},
},
],
},
{
test: /\.otf(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'application/font-otf',
},
},
],
},
{
test: /\.eot(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'file-loader',
},
],
},
{
test: /\.svg(\?v=\d+\.\d+\.\d+)?$/,
use: [
{
loader: 'url-loader',
options: {
limit: 10000,
mimetype: 'image/svg+xml',
},
},
],
},
{
test: /\.png$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
{
test: /\.jpg$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
{
test: /\.ico$/,
use: [
{
loader: 'file-loader',
options: {
name: '[name].[ext]',
},
},
],
},
],
},
plugins: [
new webpack.DefinePlugin({
'process.env': {
NODE_ENV: '"production"',
},
__DEVELOPMENT__: false,
}),
new CleanWebpackPlugin(pathsToClean, cleanOptions),
new MiniCssExtractPlugin({
filename: '[name].[contenthash:4].css',
}),
new OptimizeCSSAssetsPlugin({
cssProcessor: cssnano,
cssProcessorOptions: {
options: {
discardComments: {
removeAll: true,
},
// Run cssnano in safe mode to avoid
// potentially unsafe transformations.
safe: true,
},
},
canPrint: false,
}),
new StatsPlugin('stats.json', {
chunkModules: true,
exclude: [/node_modules[\\/]react/],
}),
// new PurifyCSSPlugin({
// paths: glob.sync(PATHS.app),
// }),
],
optimization: {
minimizer: [
new UglifyJsPlugin({
sourceMap: true,
}),
],
splitChunks: {
cacheGroups: {
commons: {
test: /[\\/]node_modules[\\/]/,
name: 'vendor',
chunks: 'initial',
},
},
},
runtimeChunk: {
name: 'manifest',
},
},
};
有些 Sass 似乎遇到了麻烦?
/** 03. Typography **/
$font-source: 'Source Sans Pro', 'Helvetica', 'Arial', sans-serif;
body {
font-size: 1em;
line-height: 1.85em;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
font-family: $font-source;
color: $color-secondary;
font-weight: 400;
}