let apiResponse = fetch("https://fjolt.com/api");console.log(apiResponse); // Returns Promise<Pending>1.2.3.在fetch() 函数运行时,JavaScript并不会等待响应。如果我们想要访问响应,我们必须明确告诉 JavaScript 需要等待。等待fetch() 有两种方法: 可以在
Luckily, there's an easier way. With the Fetch API in JavaScript, you can tell your computer to get whatever website or file you need and bring it back to you. In this article, we'll show you how to use the Fetch API in several ways. We'll also give some examples of when it m...
The following code samples will be based on theJSONPlaceholder API. Using the API, you will get ten users and display them on the page using JavaScript. This tutorial will retrieve data from the JSONPlaceholder API and display it in list items inside the author’s list. Begin by creating an...
Fetch is based on async and await. The example might be easier to understand like this:async function getText(file) { let x = await fetch(file); let y = await x.text(); myDisplay(y); } Try it Yourself » Use understandable names instead of x and y:async function getText(file)...
代码语言:javascript 代码运行次数:0 运行 AI代码解释 constformData=newFormData();formData.append('username','john_doe');formData.append('password','123456');fetch('https://example.com/login',{method:'POST',body:formData}).then(response=>response.json()).then(data=>console.log(data)).catch(...
这是因为设置 mode: 'no-cors' 实际上对浏览器说的是, “阻止我的前端 JavaScript 代码在任何情况下查看响应主体和标头的内容。” 在大多数情况下,这显然不是您想要的。 至于您 想 考虑使用 mode: 'no-cors' 的情况,请参阅 What limitations apply to opaque responses? 了解详情。它的要点是: In the ...
"permissions": [ "https://example.com/" ] 在扩展的JavaScript代码中,使用fetch函数发送请求。fetch函数是现代浏览器提供的用于发送网络请求的API。可以使用以下代码发送请求: 代码语言:javascript 复制 fetch('https://example.com/api', { method: 'GET', headers: { 'Content-Type': 'application/json', ...
JavaScript module to perform a fetch viahttps. The REST endpoint in the example does not require authentication - this was a conscious decision to keep it simple. Production applications are of course secured, but it's not hard to add OAuth2 or other authentication methods to the JavaScr...
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/then#return_value https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Using_promises Promise constructor antipattern Promise 构造函数 反模式 functionautoRetry(url, times) {returnnewPromise((resolve, rej...
fix: Uncaught (in promise) ❌ functionmaxRequest(url =``, times =3) {// 1. 闭包,保存私有属性functionautoRetry(url, times) {console.log('times = ', times); times--;// 2. fetch 本身返回值就是 Promise,不需要再次使用 Promise 包裹returnfetch(url).then(value=>{if(value.status===200...