心血来潮,写个npm 包发布吧。简单的 npm 包的发布网上有很多教程,我就不记录了。这里记录下,一个复杂的 npm 包发布,复杂指的构建环境复杂。
整个工程使用 rollup 来构建,其中会引进 babel 来转译 ES6,利用 Eslint 来规范代码的书写风格,最后代码的发布会经过 terser 压缩。同时发布 umd、es 格式的版本以供外部调用。
完整目录结构如下:
下面是整个过程的记录
一、初始化工程
yarn init -y
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初始化后,修改 package.json 内容,如 name(项目名),description(项目描述)等信息。
二、安装 rollup
yarn add [email protected] --dev
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三、创建配置文件 rollup.config.js
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
}
}
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四、安装 babel
yarn add [email protected] @babel/[email protected] @babel/[email protected] --dev
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五、配置 babel
1、创建配置文件 .babelrc
{
"presets": [
[
"@babel/preset-env",
{
"modules": false
}
]
]
}
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2、与 rollup 集成,在 rollup.config.js 中配置 plugins
import babel from 'rollup-plugin-babel'
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
},
plugins: [
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
})
]
}
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六、安装 eslint
yarn add [email protected]
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七、配置 eslint
1、生成 eslint 配置
.\node_modules\.bin\eslint --init
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2、与 rollup 集成,在 rollup.config.js 中配置 plugins
import babel from 'rollup-plugin-babel'
import { eslint } from 'rollup-plugin-eslint'
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
},
plugins: [
eslint({
include: ['src/**'],
exclude: ['node_modules/**']
}),
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
})
]
}
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八、commonjs 兼容
yarn add [email protected] [email protected] --dev
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九、与 rollup 集成,在 rollup.config.js 中配置 plugins
import babel from 'rollup-plugin-babel'
import { eslint } from 'rollup-plugin-eslint'
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
},
plugins: [
resolve({
jsnext: true,
main: true,
browser: true
}),
commonjs(),
eslint({
include: ['src/**'],
exclude: ['node_modules/**']
}),
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
})
]
}
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十、安装 terser, 用来压缩代码
yarn add [email protected] --dev
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十一、与 rollup 集成,在 rollup.config.js 中配置 plugins
import babel from 'rollup-plugin-babel'
import { eslint } from 'rollup-plugin-eslint'
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import { terser } from 'rollup-plugin-terser'
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
},
plugins: [
resolve({
jsnext: true,
main: true,
browser: true
}),
commonjs(),
eslint({
include: ['src/**'],
exclude: ['node_modules/**']
}),
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
}),
terser()
]
}
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十二、引入环境变量,实践差异化打包
1、安装插件
yarn add [email protected] --dev
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2、配置 plugins
import babel from 'rollup-plugin-babel'
import { eslint } from 'rollup-plugin-eslint'
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import { terser } from 'rollup-plugin-terser'
import replace from 'rollup-plugin-replace'
export default {
input: 'src/index.js',
output: {
file: 'index.common.js',
format: 'umd',
name: 'index'
},
plugins: [
resolve({
jsnext: true,
main: true,
browser: true
}),
commonjs(),
eslint({
include: ['src/**'],
exclude: ['node_modules/**']
}),
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
}),
replace({
exclude: 'node_modules/**',
ENVIRONMENT: JSON.stringify(process.env.NODE_ENV)
}),
terser()
]
}
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十三、参数化配置,加入版权说明,最终配置如下
import resolve from 'rollup-plugin-node-resolve'
import commonjs from 'rollup-plugin-commonjs'
import { eslint } from 'rollup-plugin-eslint'
import babel from 'rollup-plugin-babel'
import replace from 'rollup-plugin-replace'
import { terser } from 'rollup-plugin-terser'
const pJson = require('./package.json')
const version = pJson.version
const license = pJson.license
const banner =
'/*!\n' +
` * ${pJson.name} v${version}\n` +
` * (c) 2018-${new Date().getFullYear()}\n` +
` * Released under the ${license} License.\n` +
' */'
const ENV = process.env.NODE_ENV.trim()
const paths = {
input: {
root: 'src/index.js'
},
output: {
root: 'dist/'
}
}
const fileNames = {
development: 'index.common.js',
production: 'index.common.js',
production6: 'index.esm.js'
}
const fileName = fileNames[ENV]
export default {
input: `${paths.input.root}`,
output: {
file: `${paths.output.root}${fileName}`,
format: ENV === 'production6' ? 'es' : 'umd',
name: 'index',
banner
},
plugins: [
resolve({
jsnext: true,
main: true,
browser: true
}),
commonjs(),
eslint({
include: ['src/**'],
exclude: ['node_modules/**']
}),
babel({
exclude: 'node_modules/**',
runtimeHelpers: true
}),
replace({
exclude: 'node_modules/**',
ENVIRONMENT: JSON.stringify(process.env.NODE_ENV)
}),
ENV && ENV.includes('production') && terser({ output: { comments: /^!/ } })
]
}
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三、业务代码编写
在 src/index.js 中编写具体业务代码
四、打包
在 package.json 中添加
"scripts": {
"dev": "set NODE_ENV=development && rollup -c",
"build": "yarn run buildcjs && yarn run buildesm",
"buildcjs": "set NODE_ENV=production && rollup -c",
"buildesm": "set NODE_ENV=production6 && rollup -c"
}
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运行命令
yarn run build
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五、发布
npm publish
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发布前记得记得 注册 帐号,记得修改 package.json 中 private 字段为 false
"private": false
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