.then(response => console.log(response.json()))返回undefined，因为console.log方法不返回任何值;更新...
在JavaScript 中，fetch API 是一种用于发出 HTTP 请求的 API。它提供了一种简洁、现代化的方式来获取远程资源。fetch API 的优点是它的简洁性和跨浏览器兼容性。它可以替代 XMLHttpRequest，提高了代码的可读性和可维性。fetch API 的使用方式非常简单，只需要传入请求的 URL 就可以发出 HTTP 请求。它还支持 Pr...
fetch('https://another.com/page', {//...referrerPolicy:"origin-when-cross-origin"//Referer:https://javascript.info}); 我们可以将其置于所有fetch调用中,也可以将其集成到我们项目的执行所有请求并在内部使用fetch的 JavaScript 库中。 与默认行为相比,它的唯一区别在于,对于跨源请求,fetch只发送 URL 域...
Fetch is based on async and await. The example might be easier to understand like this: asyncfunctiongetText(file) { letx =awaitfetch(file); lety =awaitx.text(); myDisplay(y); } Try it Yourself » Use understandable names instead of x and y: ...
Fetch API 允许我们自定义请求,包括请求的方法、头部、体等。下面是一个POST请求的示例: fetch('https://api.example.com/data', {method:'POST',headers: {'Content-Type':'application/json', },body: JSON.stringify({name:'John',age:30}), ...
JavaScript Fetch API请求和响应 //加载进场工人不安全行为数据 var loadAllWorkerUsafeData=setInterval(function(){const url= `http://35.98.90.55/api/info?project=23`; fetch(url).then(response=> response.json()).then(data =>{ var handle_count=0; ...
Simply put, the FetchAPImakes it easy to get information from a website and do something with that data in your browser (or whatever environment you're using). For example, you can use the Fetch API to request anHTMLdocument from a website and then parse it to get certain elements out...
Step 2 — Using Fetch to get Data from an API 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...
代码语言:javascript 复制 fetch('https://api.github.com/users/ruanyf').then(response=>response.json()).then(json=>console.log(json)).catch(err=>console.log('Request Failed',err)); 上面示例中,fetch()接收到的response是一个Stream 对象,response.json()是一个异步操作,取出所有内容,并将其转为...
This polyfill supportsthe abortable fetch API. However, aborting a fetch requires use of two additional DOM APIs:AbortControllerandAbortSignal. Typically, browsers that do not support fetch will also not support AbortController or AbortSignal. Consequently, you will need to includean additional polyfill...