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 then 循环中使用 then 并操作 fetch() 的响应。
接收来自 https://example.com 的响应。 将Access-Control-Allow-Origin 标头添加到响应中。 将该响应和添加的标头传递回请求的前端代码。 然后浏览器允许前端代码访问响应,因为带有 Access-Control-Allow-Origin 响应头的响应是浏览器看到的。 即使请求是触发浏览器执行 CORS 预检 OPTIONS 请求的请求,这也有效,因为...
There was a time whenXMLHttpRequestwas used to make API requests. It didn’t include Promises, and it didn’t make for clean JavaScript code. Using jQuery, you could use the cleaner syntax ofjQuery.ajax(). Now, JavaScript has its own built-in way to make API requests. This is the F...
JavaScript Fetch API ❮ PreviousNext ❯ Examples fetch(file) .then(x => x.text()) .then(y => myDisplay(y)); Try it Yourself » Fetch is based on async and await. The example might be easier to understand like this: asyncfunctiongetText(file) {...
代码语言:javascript 复制 fetch('https://example.com/data.json') .then(response => response.json()) .then(jsonData => { // 在这里进行音频处理,例如使用Web Audio API // ... }) .catch(error => { console.error('Error:', error); }); 在这个示例中,我们使用Fetch API发送GET请求获取名...
*@augments*@example*@link*@solutions* *@best_solutions* */constlog =console.log;constautoRefetch= (url =``, times =3) => {constpromise =fetch(url); promise.then((res) =>{// return res.json();Promise.resolve(res.json());
Let there be JavaScript You can use the following 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 O...
The key is to start fetching code and data for a new view in the same event handler that triggers showing that view. 对于页面级数据,可以交给路由统一控制数据加载时机,例如: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 // Manually written logic for loading the data for the componentimpor...
Either use a test runner that can run in the browser, like Mocha, or use AVA with ky-universal. Read more. How do I use this without a bundler like Webpack? Make sure your code is running as a JavaScript module (ESM), for example by using a tag in your HTML document. Then Ky ...
Real Example on JSFiddle ➡️// simple GET request: fetch('/foo') .then( r => r.text() ) .then( txt => console.log(txt) ) // complex POST request with JSON, headers: fetch('/bear', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON....