How can i implement AJAX queuing in react-native using fetch

Question

I just have implemented AJAX calls using fetch in react-native. Implementing queuing of these AJAX calls hasn't been very well implemented. Can any one help me?

Answer 1

如果您想要发出并行请求，可以使用fetch向您返回承诺的事实，然后您可以使用Promise.all等待所有承诺的完成。

例如：

var urls = ['http://url1.net', 'http://url2.net'];
var requests = [];
urls.forEach((url)=>{
    request = fetch(url); // You can also pass options or any other parameters
    requests.push(request);
});

// Then, wait for all Promises to finish. They will run in parallel
Promise.all(requests).then((results) => {
    // Results will hold an array with the results of each promise.

}).catch((err)=>{
    // Promise.all implements a fail-fast mechanism. If a request fails, the catch method will be called immediately
});

我注意到你添加了多线程＆＃39;标签。重要的是要注意这个代码不会为你做任何线程，因为JS（通常）只在一个线程中运行。