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This article is a detailed introduction to the "method of event cycle in Node.js". The content is detailed, the steps are clear, and the details are properly handled. I hope this article "method of event cycle in Node.js" can help you solve your doubts. Let's go deeper and learn new knowledge together with the ideas of the small editor.

Node's own execution model, the event loop, makes callbacks common.

When the process starts, Node creates a loop similar to while(true), and each time the loop body executes, we call it a Tick. The process of each Tick is to see if there are any events waiting to be processed, and if so, retrieve the event and its associated callback function. If there are associated callback functions, execute them. Then enter the next loop and exit the process if there are no more event handlers

Tick Flow Chart

Event loops are a very important part of implementing Node.js non-blocking I/O! Event looping, non-blocking I/O are all low-level capabilities that belong to the C++ library LIBUV. Understanding the event loop, non-blocking I/O, explains how Node.js works asynchronously!

eventloopconst eventloop = { queue: [], //loop method loop() { //Keep checking whether there are any uncirculated messages in the queue while (this.queue.length) { const callback = this.queue.shift(); callback(); } //execute the next cycle //small knowledge points JS this binding setTimeout(this.loop.bind(this), 50); }, //add message to queue add(callback) { this.queue.push(callback); },};eventloop.loop();setTimeout(() => { eventloop.add(() => { console.log("first"); });}, 500);setTimeout(() => { eventloop.add(() => { console.log ("second"); });}, 800); Read here, this article "Node.js in the event cycle method" article has been introduced, want to master the knowledge of this article also need to practice to understand, if you want to know more about the content of the article, welcome to pay attention to the industry information channel.

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