意即 service worker 会作用于整个源地址上。换句话说,即 service worker 会接收到该域名下所有页面 的fetch事件。如果注册 service worker 的文件路径是/example/sw.js,那么 service worker 会接收到所有页面路径以/example/为开头的 URL 地址的fetch事件(比如/example/page1//example/page2/)。 在安装阶段,最好...
因为之前已经通过缓存使用过一次了,所以为了在浏览器中使用 fetch,需要复制下该请求。varfetchRequest = event.request.clone();// 没有找到缓存。所以我们需要执行 fetch 以发起请求并返回请求数据。returnfetch(fetchRequest).then(function(response){// 检测返回数据是否有效if(!response || response.status !==2...
This approach also opens up requests and responses to all of the rich features of JavaScript, including promises. To give you a sense of how the Fetch API works, here is a simple example. The rest of this guide goes into more detail....
At the moment only Fetch API officially supports it, but nothing stops you from using it inside your own code!But before jumping to it, let us spend a moment analyzing how AbortController works:const abortController = new AbortController(); // 1 const abortSignal = abortController.signal; // ...
In the above code, we define afetchData()function that simulates fetching data from a server after a delay of 2 seconds usingsetTimeout(). ThefetchData()function takes a callback function as an argument and invokes it with the fetched data. We also define aprocessData()function that logs...
The JavaScript section will fetch theh1element via the id and set a variabletimeto increment every second (we will assign themillisecondparameter to 1000). Let’s check the code for a good view of the solution. Code snippet: <!DOCTYPE html>testSeconds: 0PlayPause varoutput=document.getElemen...
To illustrate how a Fetch GET request works, let's make a call to the GitHub API to obtain a list of users. We'll use JavaScript to display this information on a web page.First, let's set up the HTML, which requires a heading and an unordered list:...
In this example, we use the Fetch API to retrieve the data and then investigate the response to check for errors and then either process the error or parse the JSON. Note that the promise ‘then’ clause is used even in the case of a unsuccessful HTTP response code. That is why there...
FETCH allows a client to retrieve all or parts of a message or group of messages, with surprising granularity. For example, a single FETCH command could retrieve all the FLAGS set for all the messages in a mailbox, or all the attachments, or all the plain-text portions of a subset of ...
The fetch API is similar to using the jQuery's $.ajax() method. You make a request to a Web API endpoint and a promise object is returned in either a fulfilled or a rejected state. In the get() method in your productController, modify the get() method to look like the following....