文章目录
- 1.介绍
- 2.处理 Css 资源
- 2.1 导入包
- 2.2 功能配置
- 2.3 添加 Css 资源
- 3.处理 Less 资源
- 3.1 导入包
- 3.2 功能配置
- 3.3 添加 Less 资源
- 4.处理 Sass 和 Scss 资源
- 4.1 导入包
- 4.2 配置
- 4.3 添加 Sass 资源
- 4.4 运行webpack
- 5.处理 Styl 资源
- 5.1 导入包
- 5.2 配置
- 5.3 添加 Styl 资源
- 5.4 运行指令
Webpack 如何处理 Css、Less、Sass、Scss、Styl 样式资源。
1.介绍
Webpack 本身是不能识别样式资源的, 需要借助 Loader 来帮助 Webpack 解析样式资源。
2.处理 Css 资源
2.1 导入包
npm i css-loader style-loader -D
css-loader: 负责将 Css 文件编译成 Webpack 能识别的模块。style-loader: 会动态创建一个 Style 标签, 里面放置 Webpack 中 Css 模块内容。
此时样式就会以 Style 标签的形式在页面上生效
2.2 功能配置
const path = require("path");
module.exports = {
entry: "./src/main.js",
output: {
path: path.resolve(__dirname, "dist"),
filename: "main.js",
},
module: {
rules: [
{
// 用来匹配 .css 结尾的文件
test: /\.css$/,
// use 数组里面 Loader 执行顺序是从右到左
use: ["style-loader", "css-loader"],
},
],
},
plugins: [],
mode: "development",
};
2.3 添加 Css 资源
src/css/index.css
.box1 {
width: 100px;
height: 100px;
background-color: pink;
}
src/main.js
import count from "./js/count";
import sum from "./js/sum";
// 引入 Css 资源，Webpack才会对其打包
import "./css/index.css";
console.log(count(2, 1));
console.log(sum(1, 2, 3, 4));
index.html
npx webpack
3.处理 Less 资源
3.1 导入包
npm i less-loader -D
less-loader: 负责将 Less 文件编译成 Css 文件。
3.2 功能配置
const path = require("path");
module.exports = {
entry: "./src/main.js",
output: {
path: path.resolve(__dirname, "dist"),
filename: "main.js",
},
module: {
rules: [
{
// 用来匹配 .css 结尾的文件
test: /\.css$/,
// use 数组里面 Loader 执行顺序是从右到左
use: ["style-loader", "css-loader"],
},
{
test: /\.less$/,
use: ["style-loader", "css-loader", "less-loader"],
},
],
},
plugins: [],
mode: "development",
};
3.3 添加 Less 资源
src/less/index.less
.box2 {
width: 100px;
height: 100px;
background-color: deeppink;
}
main.js
index.html
npx webpack
4.处理 Sass 和 Scss 资源
4.1 导入包
npm i sass-loader sass -D
- sass-loader: 负责将 Sass 文件编译成 css 文件
- sass:
sass-loader依赖sass进行编译
4.2 配置
const path = require("path");
module.exports = {
entry: "./src/main.js",
output: {
path: path.resolve(__dirname, "dist"),
filename: "main.js",
},
module: {
rules: [
{
// 用来匹配 .css 结尾的文件
test: /\.css$/,
// use 数组里面 Loader 执行顺序是从右到左
use: ["style-loader", "css-loader"],
},
{
test: /\.less$/,
use: ["style-loader", "css-loader", "less-loader"],
},
{
test: /\.s[ac]ss$/,
use: ["style-loader", "css-loader", "sass-loader"],
},
],
},
plugins: [],
mode: "development",
};
4.3 添加 Sass 资源
src/sass/index.sass
/* 可以省略大括号和分号 */
.box3
width: 100px
height: 100px
background-color: hotpink
src/sass/index.scss
.box4 {
width: 100px;
height: 100px;
background-color: lightpink;
}
src/main.js
import count from "./js/count";
import sum from "./js/sum";
// 引入资源，Webpack才会对其打包
import "./css/index.css";
import "./less/index.less";
import "./sass/index.sass";
import "./sass/index.scss";
console.log(count(2, 1));
console.log(sum(1, 2, 3, 4));
public/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>webpack5</title>
</head>
<body>
<h1>Hello Webpack5</h1>
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="box4"></div>
<script src="../dist/main.js"></script>
</body>
</html>
4.4 运行webpack
npx webpack
5.处理 Styl 资源
5.1 导入包
npm i stylus-loader -D
- stylus-loader: 负责将 Styl 文件编译成 Css 文件。
5.2 配置
const path = require("path");
module.exports = {
entry: "./src/main.js",
output: {
path: path.resolve(__dirname, "dist"),
filename: "main.js",
},
module: {
rules: [
{
// 用来匹配 .css 结尾的文件
test: /\.css$/,
// use 数组里面 Loader 执行顺序是从右到左
use: ["style-loader", "css-loader"],
},
{
test: /\.less$/,
use: ["style-loader", "css-loader", "less-loader"],
},
{
test: /\.s[ac]ss$/,
use: ["style-loader", "css-loader", "sass-loader"],
},
{
test: /\.styl$/,
use: ["style-loader", "css-loader", "stylus-loader"],
},
],
},
plugins: [],
mode: "development",
};
5.3 添加 Styl 资源
src/styl/index.styl
.box
width 100px
height 100px
background-color pink
src/main.js
import { add } from "./math";
import count from "./js/count";
import sum from "./js/sum";
// 引入资源，Webpack才会对其打包
import "./css/index.css";
import "./less/index.less";
import "./sass/index.sass";
import "./sass/index.scss";
import "./styl/index.styl";
console.log(count(2, 1));
console.log(sum(1, 2, 3, 4));
public/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>webpack5</title>
</head>
<body>
<h1>Hello Webpack5</h1>
<!-- 准备一个使用样式的 DOM 容器 -->
<div class="box1"></div>
<div class="box2"></div>
<div class="box3"></div>
<div class="box4"></div>
<div class="box5"></div>
<script src="../dist/main.js"></script>
</body>
</html>
5.4 运行指令
npx webpack
