php promise

Promise of ES6 new features and promise of es6 New Features The promise concept is introduced in the new ES6 to make the callback more elegant. Layer-by-layer nested callback will make javascript less aesthetic and readable. At the same time,

Next we will explore the concepts of Deferred and Promise in JavaScript. Deferred provides an abstract non-blocking solution (such as Ajax request response), which creates a promise object, the purpose is to return a response at a certain point in

The real problem with callback functions is that they deprive us of the ability to use the return and throw keywords. Promise solves all this well. Promise in js The real problem with callback functions is that they deprive us of the ability to

In this article, we will explore the concepts of Deferred and Promise in JavaScript. They are a very important feature in the JavaScript Toolkit (such as Dojo and MochiKit, it has also made its debut in the popular JavaScript library jQuery (which

In this article, we will explore the concepts of Deferred and Promise in JavaScript. They are a very important feature in the JavaScript Toolkit (such as Dojo and MochiKit, it has also made its debut in the popular JavaScript library jQuery (which

The interaction of Web pages is becoming more and more complex, and the asynchronous operation of JavaScript is more and more. such as the common Ajax request, need to respond when the request completes, the request is usually asynchronous, the

Web page interaction becomes more and more complex, and JavaScript asynchronous operations become more and more complex. For example, a common ajax request needs to respond to the operation when the request is complete. The request is usually

Summary of how to use javascript Promise, javascriptpromise The nested callback function is too deep, and the parallel logic must be executed in a serial manner. A Promise represents the final result of an asynchronous operation. The main way to

Web page interaction becomes more and more complex, and JavaScript asynchronous operations become more and more complex. For example, a common ajax request needs to respond to the operation when the request is complete. The request is usually

Article Introduction: The situation is more complex, if an operation to wait until the completion of more than one asynchronous Ajax request, there will be a callback function nesting situation, if you need to nest several layers, then you can only