首页 / WEBPACK / [js高手之路]深入浅出webpack教程系列8-(postcss-loader,autoprefixer,html-loader,less-loader,ejs-loader)用法
[js高手之路]深入浅出webpack教程系列8-(postcss-loader,autoprefixer,html-loader,less-loader,ejs-loader)用法
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我们接着上文，那么在上篇文章的最后，写到了css-loader的用法，如果你用心发现，就能看到我在style.css样式文件中写了一个这样的样式：
1 module.exports = {
2 plugins : [
3 require(‘autoprefixer‘)({
4 browsers : [‘last 5 versions‘]
5 })
6 ]
7 }
意思是在postcss-loader中引入autoprefixer插件
修改webpack.config.js中css loader部分的配置:
1
var htmlWebpackPlugin = require(‘html-webpack-plugin‘);
2 let path = require(‘path‘);
3 module.exports = {
4 entry: ‘./src/main.js‘,
5 output: {
6 path: __dirname + ‘/dist‘,
7 filename: ‘js/[name].bundle.js‘,
8 },
9 plugins: [
10new htmlWebpackPlugin({
11 filename: ‘index.html‘,
12 template: ‘index.html‘,
13 inject: true14 })
15 ],
16 module: {
17 rules: [
18 {
19 test: /\.js$/,
20 exclude: /(node_modules)/,
21 include: [
22 path.resolve(__dirname, "src"),
23 ],
24 use: {
25 loader: ‘babel-loader‘,
26 options: {
27 presets: [‘env‘]
28 }
29 }
30 },
31 {
32 test: /\.css$/,
33 exclude: /(node_modules)/,
34 use: [
35 ‘style-loader‘, {
36 loader : ‘css-loader‘,
37 options : {
38 importLoaders : 1
39 },
40 },
41 ‘postcss-loader‘
42 ]
43 }
44 ]
45 }
46 }
执行webpack打包，生成之后的css文件，就自动补充css3前缀了:
二、安装less-loader插件
如果我们在modal.js中直接引入modal.less，然后webpack打包，这样会报错
1 import ‘./modal.less‘;
2 let modal = function(){
3return {
4 ‘component-name‘ : ‘modal‘
5 }
6}
7 export default modal;
报错提示需要一个loader来处理， 我们可以安装less-loader了:
安装: npm install --save-dev less-loader less
安装完成之后，配置webpack.config.js
1
var htmlWebpackPlugin = require(‘html-webpack-plugin‘);
2 let path = require(‘path‘);
3 module.exports = {
4 entry: ‘./src/main.js‘,
5 output: {
6 path: __dirname + ‘/dist‘,
7 filename: ‘js/[name].bundle.js‘,
8 },
9 plugins: [
10new htmlWebpackPlugin({
11 filename: ‘index.html‘,
12 template: ‘index.html‘,
13 inject: true14 })
15 ],
16 module: {
17 rules: [
18 {
19 test: /\.js$/,
20 exclude: /(node_modules)/,
21 include: [
22 path.resolve(__dirname, "src"),
23 ],
24 use: {
25 loader: ‘babel-loader‘,
26 options: {
27 presets: [‘env‘]
28 }
29 }
30 },
31 {
32 test: /\.css$/,
33 exclude: /(node_modules)/,
34 use: [
35 ‘style-loader‘, {
36 loader : ‘css-loader‘,
37 options : {
38 importLoaders : 1
39 },
40 },
41 ‘postcss-loader‘
42 ]
43 },
44 {
45 test: /\.less$/,
46 use: [
47 {
48 loader: "style-loader"
49 }, {
50 loader: "css-loader"
51 }, {
52 loader: "less-loader"
53 }
54 ]
55 }
56 ]
57 }
58 }
当碰到less文件时，交给less-loader处理，然后交给css-loader处理，最后交由style-loader处理，然后执行webpack打包，modal.less文件中样式就被嵌入进来了
三、安装html-loader
安装命令: npm install html-loader --save-dev
modal.js文件引入modal.html
1 import ‘./modal.less‘;
2 import tpl from ‘./modal.html‘;
3 let modal = function(){
4return {
5 ‘component-name‘ : ‘modal‘,
6 ‘tpl‘ : tpl
7 }
8}
9 export default modal;
main.js对demo3目录下的index.html文件插入模板(modal.html)
1 import modal from ‘./components/modal.js‘;
2 import ‘./css/style.css‘;
3 let App = function(){
4var oApp = document.querySelector("#app");
5var oModal = new modal();
6 oApp.innerHTML = oModal.tpl;
7}
8new App();
demo3目录下的index.html文件，需要添加个div, id为app
webpack.config.js增加一项html-loader的配置
1
var htmlWebpackPlugin = require(‘html-webpack-plugin‘);
2 let path = require(‘path‘);
3 module.exports = {
4 entry: ‘./src/main.js‘,
5 output: {
6 path: __dirname + ‘/dist‘,
7 filename: ‘js/[name].bundle.js‘,
8 },
9 plugins: [
10new htmlWebpackPlugin({
11 filename: ‘index.html‘,
12 template: ‘index.html‘,
13 inject: true14 })
15 ],
16 module: {
17 rules: [
18 {
19 test: /\.js$/,
20 exclude: /(node_modules)/,
21 include: [
22 path.resolve(__dirname, "src"),
23 ],
24 use: {
25 loader: ‘babel-loader‘,
26 options: {
27 presets: [‘env‘]
28 }
29 }
30 },
31 {
32 test: /\.css$/,
33 exclude: /(node_modules)/,
34 use: [
35 ‘style-loader‘, {
36 loader : ‘css-loader‘,
37 options : {
38 importLoaders : 1
39 },
40 },
41 ‘postcss-loader‘
42 ]
43 },
44 {
45 test: /\.less$/,
46 use: [
47 {
48 loader: "style-loader"
49 }, {
50 loader: "css-loader"
51 }, {
52 loader: "less-loader"
53 }
54 ]
55 },
56 {
57 test: /\.(html)$/,
58 use: {
59 loader: ‘html-loader‘,
60 }
61 }
62 ]
63 }
64 }
然后执行webpack打包命令,就能看到modal.html被插入到id为app的div元素内了
四、修改模板后缀，为模板赋值
安装ejs-loader: npm install ejs-loader --save-dev
在components目录下新建一个文件（modal.ejs）:
1 <div class="modal">
2 <div>这个组件的名字是:<%= name %></div>
3 <% for( var i = 0; i < arr.length; i++ ){ %>
4 <%= arr[i]%>
5 <% } %>
6 </div>
modal.js引入ejs模板
1 import ‘./modal.less‘;
2// import tpl from ‘./modal.html‘; 3 import tpl from ‘./modal.ejs‘;
4 let modal = function(){
5return {
6 ‘component-name‘ : ‘modal‘,
7 ‘tpl‘ : tpl
8 }
9}
10 export default modal;
main.js为ejs模板分配数据
1 import modal from ‘./components/modal.js‘;
2 import ‘./css/style.css‘;
3 let App = function(){
4var oApp = document.querySelector("#app");
5var oModal = new modal();
6// oApp.innerHTML = oModal.tpl; 7 oApp.innerHTML = oModal.tpl({
8 name : ‘ghostwu‘,
9 arr : [ ‘ghostwu‘, ‘王朝‘, ‘马汉‘ ],
10 });
11}
12new App();
webpack.config.js添加ejs-loader的支持:
1
var htmlWebpackPlugin = require(‘html-webpack-plugin‘);
2 let path = require(‘path‘);
3 module.exports = {
4 entry: ‘./src/main.js‘,
5 output: {
6 path: __dirname + ‘/dist‘,
7 filename: ‘js/[name].bundle.js‘,
8 },
9 plugins: [
10new htmlWebpackPlugin({
11 filename: ‘index.html‘,
12 template: ‘index.html‘,
13 inject: true14 })
15 ],
16 module: {
17 rules: [
18 {
19 test: /\.js$/,
20 exclude: /(node_modules)/,
21 include: [
22 path.resolve(__dirname, "src"),
23 ],
24 use: {
25 loader: ‘babel-loader‘,
26 options: {
27 presets: [‘env‘]
28 }
29 }
30 },
31 {
32 test: /\.css$/,
33 exclude: /(node_modules)/,
34 use: [
35 ‘style-loader‘, {
36 loader : ‘css-loader‘,
37 options : {
38 importLoaders : 1
39 },
40 },
41 ‘postcss-loader‘
42 ]
43 },
44 {
45 test: /\.less$/,
46 use: [
47 {
48 loader: "style-loader"
49 }, {
50 loader: "css-loader"
51 }, {
52 loader: "less-loader"
53 }
54 ]
55 },
56 {
57 test: /\.(html)$/,
58 use: {
59 loader: ‘html-loader‘,
60 }
61 },
62 {
63 test: /\.(ejs)$/,
64 use: {
65 loader: ‘ejs-loader‘,
66 }
67 }
68 ]
69 }
70 }
然后执行webpack打包命令，就能看见新的ejs模板中的数据被嵌入在id为app的div中
原文：http://www.cnblogs.com/ghostwu/p/7504870.html
内容总结
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