Process.nextTick usage example in Node.js_node.js
I can’t remember where I first saw the call to process.nextTick. Oh, I should have seen it in the official nodejs process document. At that time, I didn’t understand what this thing was for. We already had setTimeout, so why did we need this function? And fundamentally speaking, what does this function do? What is the difference between setTimeout and setTimeout?
There is a very good post on stackoverflow that basically explains my problem. Here I attach the link and give an example in it:
stackoverflow.com >> What are the proper use cases for process.nextTick in Node.js?
var MyConstructor = function() {
...
process.nextTick(function() {
self._continue();
});
};
MyConstructor.prototype.__proto__ = EventEmitter.prototype;
MyConstructor.prototype._continue = function() {
// without the process.nextTick
// these events would be emitted immediately
// with no listeners. they would be lost.
this.emit('data', 'hello');
this.emit('data', 'world');
this.emit('end');
};
function(req, res, next) {
var c = new MyConstructor(...);
c.on('data', function(data) {
console.log(data);
});
c.on('end', next);
}
To put it simply, because of the asynchronous model, some codes may be executed before the conditions they require are completed, so put these codes that require preconditions into a callback function, and then put Go to the top of the next event loop. Then these codes will not be executed immediately, but will wait before the next round of events is started, and will be executed after starting.
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
Detailed graphic explanation of the memory and GC of the Node V8 engine
Mar 29, 2023 pm 06:02 PM
This article will give you an in-depth understanding of the memory and garbage collector (GC) of the NodeJS V8 engine. I hope it will be helpful to you!
An article about memory control in Node
Apr 26, 2023 pm 05:37 PM
The Node service built based on non-blocking and event-driven has the advantage of low memory consumption and is very suitable for handling massive network requests. Under the premise of massive requests, issues related to "memory control" need to be considered. 1. V8’s garbage collection mechanism and memory limitations Js is controlled by the garbage collection machine
Let's talk about how to choose the best Node.js Docker image?
Dec 13, 2022 pm 08:00 PM
Choosing a Docker image for Node may seem like a trivial matter, but the size and potential vulnerabilities of the image can have a significant impact on your CI/CD process and security. So how do we choose the best Node.js Docker image?
Node.js 19 is officially released, let's talk about its 6 major features!
Nov 16, 2022 pm 08:34 PM
Node 19 has been officially released. This article will give you a detailed explanation of the 6 major features of Node.js 19. I hope it will be helpful to you!
Let's talk in depth about the File module in Node
Apr 24, 2023 pm 05:49 PM
The file module is an encapsulation of underlying file operations, such as file reading/writing/opening/closing/delete adding, etc. The biggest feature of the file module is that all methods provide two versions of **synchronous** and **asynchronous**, with Methods with the sync suffix are all synchronization methods, and those without are all heterogeneous methods.
Let's talk about the event loop in Node
Apr 11, 2023 pm 07:08 PM
The event loop is a fundamental part of Node.js and enables asynchronous programming by ensuring that the main thread is not blocked. Understanding the event loop is crucial to building efficient applications. The following article will give you an in-depth understanding of the event loop in Node. I hope it will be helpful to you!
Let's talk about the GC (garbage collection) mechanism in Node.js
Nov 29, 2022 pm 08:44 PM
How does Node.js do GC (garbage collection)? The following article will take you through it.
Let's talk about how to use pkg to package Node.js projects into executable files.
Dec 02, 2022 pm 09:06 PM
How to package nodejs executable file with pkg? The following article will introduce to you how to use pkg to package a Node project into an executable file. I hope it will be helpful to you!
