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How does webpack package CSS style resources
2021-08-27 10:31:11 【Sponge bubble】
This is my participation 8 The fourth of the yuegengwen challenge 22 God , Check out the activity details :8 Yuegengwen challenge
Handle css It's all for loader To carry out , The specific use is as follows :
1、 Handle CSS
css-loader: distinguish import and url() such as import/require(), take css The file is loaded into... As a string common.js Module
style-loader: establish style label , And will js Integrate style resources in , And insert into head In the label
module: {// modular
rules: [// The rules
{test: /\.css$/, use: [{
loader:'style-loader',
options: {}
}, 'css-loader']}
]
},
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option There are many configuration items in it , You can look it up in the document
2、 Handle less
Use less-loader To precompile
{
test: /\.less$/, use: [
{
loader: 'style-loader',
options: {}
},
'css-loader',
{
loader: "less-loader"
}],
}
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3、 Integrate CSS, Extract into a separate file
After packaging ,css Will be integrated into js In the document , Exists as a string ;
So we need to put css Integrate into a css file
Use mini-css-extract-plugin plug-in unit Yes css、less To configure
{
test: /\.css$/, use: [
// Instead of style-loader, extract js Medium css In a separate file
miniCssExtractPlugin.loader
, 'css-loader']
},
{
test: /\.less$/, use: [
// Instead of style-loader, extract js Medium css In a separate file
miniCssExtractPlugin.loader,
'css-loader',
{
loader: "less-loader"
}],
}
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new miniCssExtractPlugin({
// Specify the output file directory and file name
filename:'css/built.css'
}),
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css Compatibility processing
Use postcss-loader postcss-preset-env help postcss find packa.json in browserlist The configuration inside , Load the specified by configuration css Compatible styles
package.json To configure Can be in github Search on browserslist, There are detailed configurations
"browserslist": {
// The production environment has two , But the production environment is enabled by default , So you have to set up node Environment variables to configure the development environment
"development": [
"last 1 chrome version", // Compatible with the latest Google browser version
"last 1 firefox version",
"last 1 safasi version"
],
"production": [
">0.2%", // compatible %99.8 Browser
"not head",// But don't use a dead browser
"not op_mini all"
]
}
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stay webpackp Configuration in profile node Environment variable to start the development environment
process.env.NODE_ENV = 'development';
webpack.config,js Configuration of
{
test: /\.css$/, use: [
// Instead of style-loader, extract js Medium css In a separate file
miniCssExtractPlugin.loader,
'css-loader',
{
loader: "postcss-loader",
options: {
ident:'postcss',
plugins:()=>[
// postcss Plug in for
require('postcss-preset-env')()
]
}
}
]
}
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Compress CSS
The use of plug-in optimize-css-assets-webpack-plugin
Call directly new optimizeCssAssetsWebpackPlugin()
copyright notice
author[Sponge bubble],Please bring the original link to reprint, thank you.
https://en.qdmana.com/2021/08/20210827103107580y.html
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