yarn init -y

yarn add koa koa-router cross-env module-alias dotenv

{
 "compilerOptions": {
    "target": "esnext", // 目標(biāo)語言版本
    "module": "commonjs", // 指定生成代碼的模板標(biāo)準(zhǔn)
    "sourceMap": true,
    "outDir": "./dist", // 指定輸出目錄, 默認(rèn)是dist文件夾
    "rootDir": "./src",  
    "strict": true,
    "esModuleInterop": true,
    "allowSyntheticDefaultImports": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true
 },
 // 需要編譯的的文件和目錄
 "include": ["src"],
 "exclude": ["node_modules", "dist", "public"]
}

"scripts": {
"dev": "cross-env NODE_ENV=development tsnd --respawn src/main.ts", // 開發(fā)環(huán)境執(zhí)行的腳本命令，設(shè)置環(huán)境變量并監(jiān)聽入口文件的變化
"build": "run-s clearBuild compile copyPublic", // 將TypeScript項(xiàng)目打包成JavaScript項(xiàng)目
"clearBuild": "rimraf dist/*", // 在構(gòu)建的時(shí)候清空dist目錄
"compile": "tsc", // 根據(jù)tsconfig.json的配置編譯TypeScript
"copyPublic": "copyfiles -u 1 src/public/* dist", // 有一些資源是需要我們在dist和src之間來回拷貝的，可以借助該命令實(shí)現(xiàn)拷貝
// 其余部分可以按照自己項(xiàng)目最終的部署方式自定義
"serve": "cross-env NODE_ENV=production node dist/main.js",
"start": "pm2 start ecosystem.config.js",
"stop": "pm2 stop ecosystem.config.js",
"restart": "pm2 restart ecosystem.config.js",
"delete": "pm2 delete ecosystem.config.js"
},

const pathResolve = (str: string)
:
string => path.resolve(process.cwd(), str);
const processENV = process.env.NODE_ENV
const isDev = processENV === "development"
try {
    const filename = isDev ? "./.env" : "./.env"
    dotenv.config({path: pathResolve(filename)});
} catch (err) {
    console.log(`${pathResolve(filename)} 不存在`);
}
try {
    const filename = isDev ? "./.env.development" : "./.env.production"
    dotenv.config({path: pathResolve(filename)});
} catch (err) {
    console.log(`${pathResolve(filename)} 不存在`);
}
try {
    const filename = isDev ? "./.env.local" : "./.env.local"
    dotenv.config({path: pathResolve(filename)});
} catch (err) {
    console.log(`${pathResolve(filename)} 不存在`);
}
try {
    const filename = isDev ? "./.env.development.local" : "./.env.production.local"
    dotenv.config({path: pathResolve(filename)});
} catch (err) {
    console.log(`${pathResolve(filename)} 不存在`);
}

"_moduleAliases": {
"@": "./src",
"@app": "./src/app"
}

import "module-alias/register";

yarn add eslint -D
# 初始化Eslint的配置文件，會(huì)在項(xiàng)目根目錄下生成Eslint的配置文件
npx eslint --init

"script": {
//......
"lint:fix": "eslint --fix --ext .js,.ts,.tsx ."
}

dist
node_modules
.idea
.DS_Store