if ("Promise" in window) { let btn = document.getElementById("make-promise"); btn.addEventListener("click",testPromise); } else { log = document.getElementById('log'); log.textContent = "Live example not available as your browser doesn't support the Promise interface."; } Copy to Cli...
Promise最早出现在 1988 年,由Barbara Liskov、Liuba Shrira首创(论文:Promises: Linguistic Support for Efficient Asynchronous Procedure Calls in Distributed Systems)。并且在语言MultiLisp和Concurrent Prolog中已经有了类似的实现。 JavaScript 中,Promise的流行是得益于jQuery的方法jQuery.Deferred(),其他也有一些更精简...
In the example, we wait for all promises to finish and in the end, we calculate the sum of returned values. $ node all.js finished 600 JS multiple requests with axios In the next example, we use the axois library to execute multiple get requests. Axios is a promise-based HTTP client ...
}autoRefetch(`https://cdn.xgqfrms.xyz/json/badges.js`) .then(res=>console.log('json =', res.json())) .catch(err=>console.error(`err =`, err)) .finally(() =>{console.log('whatever close loading...'); }); fix: Uncaught (in promise) ❌ functionmaxRequest(url =``, times ...
Example // Create a Promise constmyPromise1 =newPromise((resolve, reject) => { setTimeout(resolve,200,"King"); }); // Create another Promise constmyPromise2 =newPromise((resolve, reject) => { setTimeout(resolve,100,"Queen");
function timeout(timeoutInMs, promise) { return Promise.race([ promise, resolveAfter(timeoutInMs, Promise.reject(new Error('Operation timed out'))), ]); } timeout() 返回一个Promise,该 Promise 的状态取决于传入 promise 状态。 其中timeout 函数中的 resolveAfter(timeoutInMs, Promise.reject...
Here's an example of computing a future factorial using Web Workers (supported in Safari, Chrome, Firefox, Opera and IE 10 (as of Platform Preview 2):複製 1: // factorial.js 複製 2: onmessage = function(e) { 複製 3: var value = e.data; ...
For example, you may have three items you want to process. Using corresponding results ensures that the processed result for the first item from the source array is located at the first position in the result array (=index0). The result for the second item from the source array is placed...
// Example: `response.headers['content-type']` headers: {}, // `config` is the config that was provided to `axios` for the request config: {}, // `request` is the request that generated this response // It is the last ClientRequest instance in node.js (in redirects) // and an...
$(this).fadeIn().fadeOut(1000* ( i +1) ); }); $("div").promise().done(function(){ $("p").append(" Finished! "); }); }); Demo: Example 3 Resolve the returned Promise using a$.when()statement (the.promise()method makes it possible to do this with jQuery collections...