async function fetchData(): Promise<string> { const response = await fetch("https://example.com"); const data = await response.text(); return data; }13. 错误处理(Error Handling)TypeScript 允许使用 try/catch 块进行错误处理,还可以使用类型来描述错误的类型。实例...
asyncfunctionfetchDataWithErrorHandling(apiUrl:string):Promise<any>{try{constresponse=awaitfetch(apiUrl);if(!response.ok){thrownewError('Network response was not ok');}constdata=awaitresponse.json();returndata;}catch(error){console.error('Error fetching data:',error);throwerror;// 抛出错误以便...
export const fetchUsersWithErrorHandling = async (): Promise<UserListResponse | null> => { try { return await apiRequest<UserListResponse>('/users', 'GET'); } catch (error) { console.error('获取用户时出错:', error); return null; } }; // 用户列表的响应类型 将React 组件集成 现在我...
在TypeScript中,我们可以使用async和await关键字来处理异步函数,使代码更易于编写和理解。例如: AI检测代码解析 async function fetchData(): Promise<Data> { const response = await fetch('https://api.example.com/data'); const data = await response.json(); return data; } function processData(data: ...
{constinit=configToFetchInit(config);returnfetch(config.url,init);}// Here's what a request might look like (ignoring any API error handling).constshopId=8675309;EtsyFetch(getListingsForShop(shopId)).then((response)=>response.json()).then((data)=>{alert(data.listings.map(({id})=>id)...
Doing so helps reduce polymorphism in different operations, which allows runtimes to fetch properties more quickly. By making this change, we witnessed impressive speed wins in the compiler; however, most of these changes were performed on internal allocators for our data structures. The language ...
{constuserInfo:UserInfo=awaitdbAccessSemaphore.waitForCompletion(fetchUserInfo);res.status(HTTP_OK_CODE).send(userInfo);}catch(err){// err was thrown by the fetchUserInfo job.logger.error(`Failed fetching user info for userID${req.userID}with error:${err.message}`);res.status(HTTP_ERROR_CODE...
const{resources}=awaitusersContainer.items.readAll<TUser[]>().fetchAll(); upsert (update or insert if item doesn't exist) const{resource}=awaitusersContainer.items.upsert<Partial<TUser>>(user); Environment Variables Setup Create a.envfile in the root directory of your pro...
// Simulating an untyped library function declare function fetchData(): any; const response = fetchData(); response.name = "Test"; console.log(response.name); // Output: Test (assumed) The fetchData function, declared as returning any, mimics an untyped library. The response variable ...
handleError(error); // 正确 // handleError({ code: 404 }); // 错误,缺少message属性 异步编程与TypeScript 异步函数 在Node.js中,异步编程是常见的模式。TypeScript通过async/await语法支持异步函数: // asyncFunction.ts async function fetchUser(userId: number): Promise<User> { ...