Rollup构建TS项目
安装依赖
1.全局安装rollup npm install rollup-g
2.安装TypeScript npm install typescript -D
3.安装TypeScript 转换器 npm install rollup-plugin-typescript2 -D
4安装代码压缩插件 npm install rollup-plugin-terser -D
5 安装rollupweb服务 npm install rollup-plugin-serve -D
6 安装热更新 npm install rollup-plugin-livereload -D
7引入外部依赖 npm install rollup-plugin-node-resolve -D
8安装配置环境变量用来区分本地和生产 npm install cross-env -D
9替换环境变量给浏览器使用 npm install rollup-plugin-replace -D
webpack rollup打包对比
配置json文件
npm init -y
{ "name": "rollupTs", "version": "1.0.0", "description": "", "main": "index.js", "scripts": { "test": "echo \"Error: no test specified\" && exit 1", "dev": "cross-env NODE_ENV=development rollup -c -w", "build":"cross-env NODE_ENV=produaction rollup -c" }, "keywords": [], "author": "", "license": "ISC", "devDependencies": { "cross-env": "^7.0.3", "rollup-plugin-livereload": "^2.0.5", "rollup-plugin-node-resolve": "^5.2.0", "rollup-plugin-replace": "^2.2.0", "rollup-plugin-serve": "^1.1.0", "rollup-plugin-terser": "^7.0.2", "rollup-plugin-typescript2": "^0.31.1", "typescript": "^4.5.5" } }
配置rollup文件
console.log(process.env); import ts from 'rollup-plugin-typescript2' import path from 'path' import serve from 'rollup-plugin-serve' import livereload from 'rollup-plugin-livereload' import { terser } from 'rollup-plugin-terser' import resolve from 'rollup-plugin-node-resolve' import repacle from 'rollup-plugin-replace' const isDev = () => { return process.env.NODE_ENV === 'development' } export default { input: "./src/main.ts", output: { file: path.resolve(__dirname, './lib/index.js'), format: "umd", sourcemap: true }, plugins: [ ts(), terser({ compress: { drop_console: !isDev() } }), repacle({ 'process.env.NODE_ENV': JSON.stringify(process.env.NODE_ENV) }), resolve(['.js', '.ts']), isDev() && livereload(), isDev() && serve({ open: true, openPage: "/public/index.html" }) ] }
配置tsconfig.json
{ "compilerOptions": { /* Visit https://aka.ms/tsconfig.json to read more about this file */ /* Projects */ // "incremental": true, /* Enable incremental compilation */ // "composite": true, /* Enable constraints that allow a TypeScript project to be used with project references. */ // "tsBuildInfoFile": "./", /* Specify the folder for .tsbuildinfo incremental compilation files. */ // "disableSourceOfProjectReferenceRedirect": true, /* Disable preferring source files instead of declaration files when referencing composite projects */ // "disableSolutionSearching": true, /* Opt a project out of multi-project reference checking when editing. */ // "disableReferencedProjectLoad": true, /* Reduce the number of projects loaded automatically by TypeScript. */ /* Language and Environment */ "target": "es5", /* Set the JavaScript language version for emitted JavaScript and include compatible library declarations. */ // "lib": [], /* Specify a set of bundled library declaration files that describe the target runtime environment. */ // "jsx": "preserve", /* Specify what JSX code is generated. */ // "experimentalDecorators": true, /* Enable experimental support for TC39 stage 2 draft decorators. */ // "emitDecoratorMetadata": true, /* Emit design-type metadata for decorated declarations in source files. */ // "jsxFactory": "", /* Specify the JSX factory function used when targeting React JSX emit, e.g. 'React.createElement' or 'h' */ // "jsxFragmentFactory": "", /* Specify the JSX Fragment reference used for fragments when targeting React JSX emit e.g. 'React.Fragment' or 'Fragment'. */ // "jsxImportSource": "", /* Specify module specifier used to import the JSX factory functions when using `jsx: react-jsx*`.` */ // "reactNamespace": "", /* Specify the object invoked for `createElement`. This only applies when targeting `react` JSX emit. */ // "noLib": true, /* Disable including any library files, including the default lib.d.ts. */ // "useDefineForClassFields": true, /* Emit ECMAScript-standard-compliant class fields. */ /* Modules */ "module": "ES2015", /* Specify what module code is generated. */ // "rootDir": "./", /* Specify the root folder within your source files. */ // "moduleResolution": "node", /* Specify how TypeScript looks up a file from a given module specifier. */ // "baseUrl": "./", /* Specify the base directory to resolve non-relative module names. */ // "paths": {}, /* Specify a set of entries that re-map imports to additional lookup locations. */ // "rootDirs": [], /* Allow multiple folders to be treated as one when resolving modules. */ // "typeRoots": [], /* Specify multiple folders that act like `./node_modules/@types`. */ // "types": [], /* Specify type package names to be included without being referenced in a source file. */ // "allowUmdGlobalAccess": true, /* Allow accessing UMD globals from modules. */ // "resolveJsonModule": true, /* Enable importing .json files */ // "noResolve": true, /* Disallow `import`s, `require`s or `<reference>`s from expanding the number of files TypeScript should add to a project. */ /* JavaScript Support */ // "allowJs": true, /* Allow JavaScript files to be a part of your program. Use the `checkJS` option to get errors from these files. */ // "checkJs": true, /* Enable error reporting in type-checked JavaScript files. */ // "maxNodeModuleJsDepth": 1, /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */ /* Emit */ // "declaration": true, /* Generate .d.ts files from TypeScript and JavaScript files in your project. */ // "declarationMap": true, /* Create sourcemaps for d.ts files. */ // "emitDeclarationOnly": true, /* Only output d.ts files and not JavaScript files. */ "sourceMap": true, /* Create source map files for emitted JavaScript files. */ // "outFile": "./", /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */ // "outDir": "./", /* Specify an output folder for all emitted files. */ // "removeComments": true, /* Disable emitting comments. */ // "noEmit": true, /* Disable emitting files from a compilation. */ // "importHelpers": true, /* Allow importing helper functions from tslib once per project, instead of including them per-file. */ // "importsNotUsedAsValues": "remove", /* Specify emit/checking behavior for imports that are only used for types */ // "downlevelIteration": true, /* Emit more compliant, but verbose and less performant JavaScript for iteration. */ // "sourceRoot": "", /* Specify the root path for debuggers to find the reference source code. */ // "mapRoot": "", /* Specify the location where debugger should locate map files instead of generated locations. */ // "inlineSourceMap": true, /* Include sourcemap files inside the emitted JavaScript. */ // "inlineSources": true, /* Include source code in the sourcemaps inside the emitted JavaScript. */ // "emitBOM": true, /* Emit a UTF-8 Byte Order Mark (BOM) in the beginning of output files. */ // "newLine": "crlf", /* Set the newline character for emitting files. */ // "stripInternal": true, /* Disable emitting declarations that have `@internal` in their JSDoc comments. */ // "noEmitHelpers": true, /* Disable generating custom helper functions like `__extends` in compiled output. */ // "noEmitOnError": true, /* Disable emitting files if any type checking errors are reported. */ // "preserveConstEnums": true, /* Disable erasing `const enum` declarations in generated code. */ // "declarationDir": "./", /* Specify the output directory for generated declaration files. */ // "preserveValueImports": true, /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */ /* Interop Constraints */ // "isolatedModules": true, /* Ensure that each file can be safely transpiled without relying on other imports. */ // "allowSyntheticDefaultImports": true, /* Allow 'import x from y' when a module doesn't have a default export. */ "esModuleInterop": true, /* Emit additional JavaScript to ease support for importing CommonJS modules. This enables `allowSyntheticDefaultImports` for type compatibility. */ // "preserveSymlinks": true, /* Disable resolving symlinks to their realpath. This correlates to the same flag in node. */ "forceConsistentCasingInFileNames": true, /* Ensure that casing is correct in imports. */ /* Type Checking */ "strict": true, /* Enable all strict type-checking options. */ // "noImplicitAny": true, /* Enable error reporting for expressions and declarations with an implied `any` type.. */ // "strictNullChecks": true, /* When type checking, take into account `null` and `undefined`. */ // "strictFunctionTypes": true, /* When assigning functions, check to ensure parameters and the return values are subtype-compatible. */ // "strictBindCallApply": true, /* Check that the arguments for `bind`, `call`, and `apply` methods match the original function. */ // "strictPropertyInitialization": true, /* Check for class properties that are declared but not set in the constructor. */ // "noImplicitThis": true, /* Enable error reporting when `this` is given the type `any`. */ // "useUnknownInCatchVariables": true, /* Type catch clause variables as 'unknown' instead of 'any'. */ // "alwaysStrict": true, /* Ensure 'use strict' is always emitted. */ // "noUnusedLocals": true, /* Enable error reporting when a local variables aren't read. */ // "noUnusedParameters": true, /* Raise an error when a function parameter isn't read */ // "exactOptionalPropertyTypes": true, /* Interpret optional property types as written, rather than adding 'undefined'. */ // "noImplicitReturns": true, /* Enable error reporting for codepaths that do not explicitly return in a function. */ // "noFallthroughCasesInSwitch": true, /* Enable error reporting for fallthrough cases in switch statements. */ // "noUncheckedIndexedAccess": true, /* Include 'undefined' in index signature results */ // "noImplicitOverride": true, /* Ensure overriding members in derived classes are marked with an override modifier. */ // "noPropertyAccessFromIndexSignature": true, /* Enforces using indexed accessors for keys declared using an indexed type */ // "allowUnusedLabels": true, /* Disable error reporting for unused labels. */ // "allowUnreachableCode": true, /* Disable error reporting for unreachable code. */ /* Completeness */ // "skipDefaultLibCheck": true, /* Skip type checking .d.ts files that are included with TypeScript. */ "skipLibCheck": true /* Skip type checking all .d.ts files. */ } }
npm run dev 启动就可以尽情的玩耍了
webpack构建TS项目
安装依赖
安装webpack npm install webpack -D
webpack4以上需要 npm install webpack-cli -D
编译TS npm install ts-loader -D
TS环境 npm install typescript -D
热更新服务 npm install webpack-dev-server -D
HTML模板 npm install html-webpack-plugin -D
配置文件
const path = require('path') const htmlWebpackPlugin = require('html-webpack-plugin') module.exports = { entry: "./src/index.ts", mode: "development", output: { path: path.resolve(__dirname, './dist'), filename: "index.js" }, stats: "none", resolve: { extensions: ['.ts', '.js'], alias: { '@': path.resolve(__dirname, './src') } }, module: { rules: [ { test: /\.ts$/, use: "ts-loader" } ] }, devServer: { port: 1988, proxy: {} }, plugins: [ new htmlWebpackPlugin({ template: "./public/index.html" }) ] }
目录结构
esbuild + swc 构建ts项目
本文正在参加「金石计划」
前端工具层出不穷,之前有常用的打包工具webpack,现在有了速度更快的vite。 vite的开发模式是基于esBuild编译的,打包又是基于rollup,启动项目是很快的。
esbuild为什么这么快
在esbuild的官方介绍中打包threejs 只需要0.37秒 无限接近于亚索的Q技能冷却时间可以说是很快了。
esbuild是go语言编写的并且是多线程执行,性能是js的好几十倍,所以很快。
- 无需缓存即可实现基础打包
- 支持 ES6 跟 CommonJS 模块
- 支持ES 6 Tree Shaking
- 体积小
- 插件化
- 其他
- 内置支持编译 jsx
SWC
SWC则宣称其比Babel快20倍(四核情况下可以快70倍)
swc是用rust写的,所实现的功能跟babel一样,es6语法转es5,但是速度比babel更快,前端基建工具使用rust的是越来越多了,未来可能还会有一个替代postCss的😂。
那如果把esbuild + swc结合起来构建那岂不是接近光速 我们来try try
实例
npm install @swc/core esbuild @swc/helpers 复制代码
其中,@swc/core 是 swc 的核心包,用于编译 JavaScript 和 TypeScript 代码;esbuild 是一个快速的 JavaScript 和 TypeScript 构建工具;@swc/helpers 是 swc 的辅助包,用于转换 JSX 代码。
import esbuild from 'esbuild'//打包工具 import swc from '@swc/core'//类似于babel es6 转 es5 import fs from 'node:fs' await esbuild.build({ entryPoints: ['./index.ts'], //入口文件 bundle: true, //模块单独打包 loader: { '.js': 'js', '.ts': 'ts', '.jsx': 'jsx', '.tsx': 'tsx', }, treeShaking:true, define: { 'process.env.NODE_ENV': '"production"', }, plugins: [ { //实现自定义loader name: "swc-loader", setup(build) { build.onLoad({ filter: /\.(js|ts|tsx|jsx)$/ }, (args) => { // console.log(args); const content = fs.readFileSync(args.path, "utf-8") const { code } = swc.transformSync(content, { filename: args.path }) return { contents: code } }) }, } ], outdir: "dist" }) 复制代码
测试demo
export const a:number = 1 export const b:string = 'ikun' let x = 1 let fn = () => 123 console.log(x,fn); 复制代码
转移之后的
export var a = 1; export var b = "ikun"; var x = 1; var fn = function() { return 123; }; console.log(x, fn); 复制代码
高级用法
除了上述基本用法之外,swc 和 esbuild 还提供了许多高级用法,可以更好地满足我们的构建需求。
插件系统
swc 和 esbuild 都提供了插件系统,可以通过插件来扩展其功能。例如,swc 的插件可以用于优化代码,提高性能。esbuild 的插件则可以用于处理特定类型的文件,或自定义转换规则。
缓存系统
swc 和 esbuild 都提供了缓存系统,可以减少重复编译时间。当文件内容没有发生变化时,swc 和 esbuild 会从缓存中读取已编译的代码,以提高构建速度。
Watch 模式
swc 和 esbuild 都支持 Watch 模式,可以在文件发生变化时自动重新编译代码。Watch 模式可以减少手动运行构建命令的频率,提高开发效率。
自定义插件
最后,我们可以通过编写自定义插件来扩展 swc 和 esbuild 的功能。例如,可以编写一个插件来自动引入 CSS 文件,或者优化 JavaScript 代码。自定义插件可以根据实际需求进行编写,以更好地满足项目的构建需求。
结论
本文介绍了如何使用 swc 和 esbuild 来构建一个简单的 TypeScript 应用程序,并讨论了一些高级用法。swc 和 esbuild 都是现代前端构建工具中的代表,它们都提供了快速编译、代码压缩等功能,可以有效提高应用程序的性能。通过学习 swc 和 esbuild 的使用方法,我们可以更好地进行前端工程化开发,提高开发效率和代码质量。