init

.gitignore

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+node_modules

package.json

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+{
+  "name": "dist",
+  "version": "1.0.0",
+  "description": "",
+  "license": "ISC",
+  "author": "",
+  "type": "module",
+  "main": "index.js",
+  "scripts": {
+    "dev": "tsx src/server.ts",
+    "build": "tsc",
+    "start": "node dist/index.js",
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "dependencies": {
+    "axios": "^1.13.1",
+    "express": "^5.1.0"
+  },
+  "devDependencies": {
+    "@types/express": "^5.0.5",
+    "@types/node": "^24.10.0",
+    "nodemon": "^3.1.10",
+    "ts-node": "^10.9.2",
+    "tsx": "^4.20.6",
+    "typescript": "^5.9.3"
+  }
+}

src/server.ts

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+import express from 'express';
+const app = express();
+const PORT = process.env.PORT || 3000;
+
+app.get('/', (_req, res) => {
+  res.send('Hello, TypeScript + Express!');
+});
+
+app.listen(PORT, () => {
+  console.log(`Server running on port ${PORT}`);
+});

src/services/userService.ts

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+import { http } from '@/utils/http';
+
+interface User {
+  id: number;
+  name: string;
+}
+
+export const fetchUser = (id: number) => {
+  return http.get<User>(`/users/${id}`);
+};
+
+export const createUser = (data: Partial<User>) => {
+  return http.post<User>('/users', data);
+};

src/utils/http/client.ts

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+import axios from 'axios';
+import type { AxiosInstance } from 'axios';
+
+const createHttpClient = (baseURL: string): AxiosInstance => {
+  const instance = axios.create({
+    baseURL,
+    timeout: 10000,
+    headers: { 'Content-Type': 'application/json' },
+  });
+
+  // 请求拦截器（可加 token、日志等）
+  instance.interceptors.request.use(
+    (config) => {
+      // 例如：config.headers.Authorization = `Bearer ${getToken()}`;
+      return config;
+    },
+    (error) => Promise.reject(error)
+  );
+
+  // 响应拦截器（统一错误处理）
+  instance.interceptors.response.use(
+    (response) => response.data, // 直接返回 data
+    (error) => {
+      // 统一错误日志或上报
+      console.error('HTTP Error:', error.response?.data || error.message);
+      return Promise.reject(error);
+    }
+  );
+
+  return instance;
+};
+
+export default createHttpClient;

src/utils/http/index.ts

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+import createHttpClient from './client';
+import type { AxiosRequestConfig } from 'axios';
+
+// 按服务划分多个 client（可选）
+const apiClient = createHttpClient(process.env.API_BASE_URL || 'http://localhost:3000');
+
+export const http = {
+  get: <T>(url: string, config?: AxiosRequestConfig) => apiClient.get<T>(url, config),
+  post: <T>(url: string, data?: any, config?: AxiosRequestConfig) => apiClient.post<T>(url, data, config),
+  put: <T>(url: string, data?: any, config?: AxiosRequestConfig) => apiClient.put<T>(url, data, config),
+  delete: <T>(url: string, config?: AxiosRequestConfig) => apiClient.delete<T>(url, config),
+};

tsconfig.json

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+{
+  "compilerOptions": {
+    "rootDir": "src",
+    "outDir": "dist",
+    "module": "CommonJS",
+    "moduleResolution": "node",
+    "target": "ES2020",
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+    "strict": true,
+    "skipLibCheck": true,
+    "baseUrl": ".",
+    "paths": {
+      "@/*": ["src/*"]
+    }
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}