关于webpack的资料大体分3处 ，一处是官网（纯英文，资料比较多）,一处是中文网（不建议，就如不知道谁说的一句话，讲的是1+1，而实际用的却是微积分难度），还有各大博客，知识点零散，无系统知识架构，所以只好慢慢根据官网总结。
配置文件config：可以自己写也可以默认的webpack init生成
配合npm 使用
"scripts": {
"build": "webpack"
},
可以用“--”传自定义参数进去，请大胆使用es2015里面的import/export
var path = require('path');
module.exports = {
entry: './app/index.js',
output: {
filename: 'bundle.js',
path: path.resolve(__dirname, 'dist') 第一个参数是模块绝对路径
}
};
当运行build命令之后就会在当前路径的基础上,参照dist生成文件
安装:
npm install webpack –g 至于全局和局部安装问题，一个是在npm的安装目录下 一个是在项目node_modules下,但是全局安装后还是需要局部安装，因为需要用到require，require无法引入全局安装的模块
"scripts": {
"start": "webpack --config mywebpack.config.js"
}
下面是官方给的配置例子
var path = require('path');
module.exports = {
entry: "./app/entry", //入口 output: {
path: path.resolve(__dirname, "dist"), // string输出的目录
filename: "bundle.js", // string 输出的名字
publicPath: "/assets/", // string 静态资源目录
library: "MyLibrary", // string,
// the name of the exported library
libraryTarget: "umd", // universal module definition
// the type of the exported library
/* Advanced output configuration (click to show) */
},
module: {
rules: [
// rules for modules (configure loaders, parser options, etc.)
{
test: /.jsx?$/,
include: [
path.resolve(__dirname, "app")
],
exclude: [
path.resolve(__dirname, "app/demo-files")
],
// these are matching conditions, each accepting a regular expression or string
// test and include have the same behavior, both must be matched
// exclude must not be matched (takes preferrence over test and include)
// Best practices:
// - Use RegExp only in test and for filename matching
// - Use arrays of absolute paths in include and exclude
// - Try to avoid exclude and prefer include
issuer: { test, include, exclude },
// conditions for the issuer (the origin of the import)
enforce: "pre",
enforce: "post",
// flags to apply these rules, even if they are overridden (advanced option)
loader: "babel-loader",
// the loader which should be applied, it'll be resolved relative to the context
// -loader suffix is no longer optional in webpack2 for clarity reasons
// see webpack 1 upgrade guide
options: {
presets: ["es2015"]
},
// options for the loader
},
{
test: ".html$",
use: [
// apply multiple loaders and options
"htmllint-loader",
{
loader: "html-loader",
options: {
/* ... */
}
}
]
},
{ oneOf: [ /* rules */ ] },
// only use one of these nested rules
{ rules: [ /* rules */ ] },
// use all of these nested rules (combine with conditions to be useful)
{ resource: { and: [ /* conditions */ ] } },
// matches only if all conditions are matched
{ resource: { or: [ /* conditions */ ] } },
{ resource: [ /* conditions */ ] }
// matches if any condition is matched (default for arrays)
{ resource: { not: /* condition */ } }
// matches if the condition is not matched
],
/* Advanced module configuration (click to show) */
},
resolve: {
// options for resolving module requests
// (does not apply to resolving to loaders)
modules: [
"node_modules",
path.resolve(__dirname, "app")
],
// directories where to look for modules
extensions: [".js", ".json", ".jsx", ".css"],
// extensions that are used
alias: {
// a list of module name aliases
"module": "new-module",
// alias "module" -> "new-module" and "module/path/file" -> "new-module/path/file"
"only-module$": "new-module",
// alias "only-module" -> "new-module", but not "module/path/file" -> "new-module/path/file"
"module": path.resolve(__dirname, "app/third/module.js"),
// alias "module" -> "./app/third/module.js" and "module/file" results in error
// modules aliases are imported relative to the current context
},
/* alternative alias syntax (click to show) */
/* Advanced resolve configuration (click to show) */
},
performance: {
hints: "warning", // enum
maxAssetSize: 200000, // int (in bytes),
maxEntrypointSize: 400000, // int (in bytes)
assetFilter: function(assetFilename) {
// Function predicate that provides asset filenames
return assetFilename.endsWith('.css') || assetFilename.endsWith('.js');
}
},
devtool: "source-map", // enum
// enhance debugging by adding meta info for the browser devtools
// source-map most detailed at the expense of build speed.
context: __dirname, // string (absolute path!)
// the home directory for webpack
// the entry and module.rules.loader option
// is resolved relative to this directory
target: "web", // enum
// the environment in which the bundle should run
// changes chunk loading behavior and available modules
externals: ["react", /^@angular//],
// Don't follow/bundle these modules, but request them at runtime from the environment
stats: "errors-only",
// lets you precisely control what bundle information gets displayed
devServer: {
proxy: { // proxy URLs to backend development server
'/api': 'http://localhost:3000'
},
contentBase: path.join(__dirname, 'public'), // boolean | string | array, static file location
compress: true, // enable gzip compression
historyApiFallback: true, // true for index.html upon 404, object for multiple paths
hot: true, // hot module replacement. Depends on HotModuleReplacementPlugin
https: false, // true for self-signed, object for cert authority
noInfo: true, // only errors & warns on hot reload
// ...
},
plugins: [
// ...
],
// list of additional plugins
/* Advanced configuration (click to show) */
}
基于vue官方脚手架教程：别人博客
http://donglegend.com/2016/08/25/webpack%E9%82%A3%E4%BA%9B%E4%BA%8B%E5%84%BF04/#