node js use cases

Use of the fs. close method in node. js, node. jsfs. close Method description: Close the file asynchronously. Syntax: Copy codeThe Code is as follows:Fs. close (fd, [callback (err)]) Because this method belongs to the fs module, we need to introduce the fs module (var fs = require ("fs") before

The use of the console. dir method in node. js is described as follows: node. jsconsole. dir Method description: Pass obj as a parameter to util. inspect and execute the command to print the returned result to stdout. This function ignores any custom inspect () function objects. Syntax: Copy codeThe Code is as fol

This article mainly introduces socket in node. io event Usage Details. For more information, see socket. the io class library can not only send messages to each other, but also send events to each other through the emit method of the socket port object. In the previous event, emit said that it was used to manually trigger the event. The Code is as follows: Socket. emit (event, data, function (data1, data2 ......){}); When you

Introduction The popularity of JavaScript has brought about many changes, so that the form of using it for network development has become completely different. Just like in a browser, we can also run JavaScript on the server, from the frontend to the backend. This huge contrast is hard to imagine, just a few years ago, Javascript was embedded as a web page in a sandbox as a Flash or Java applet. Go deep into Node. before using JavaScript, you may need

are just ways to use the network to pass data to the sandbox environment on the client. They are all run in isolation and often operate to non-standard ports that require additional permissions.With its unique advantages, node. JS now plays a key role in the products of many well-known companies.In this article, we will discuss not only how these benefits are ac

allows programs to localize dependencies to prevent conflicts. Optimize the 'node _ modules' search process When the hierarchy of the nested dependency is very deep, the file search list may become very long. Therefore, perform the following optimization during search: First,/node_modules is not appended to a folder ending with/node_modules. Second, if the file that calls require () is already in a node_modules level, the node_modules folder at the t

Why should you use node. jsThe popularity of JavaScript has changed so much that the way it is being used for web development today has become quite different. Just like in the browser, we can now run JavaScript on the server, spanning from the front to the back, which is unimaginable because JavaScript is like a Flash or Java applet just a few years ago. That way, embedding the Web page runs in a sandbox e

node's handy tip--Compression codeDownload ImageCompress CodeI believe many front-end students will be on the line before the compression JS code, now Gulp Webpack Grunt ... can be easily achieved. But the problem comes, these will not, it is necessary to face dozens of JS files back and forth "copy-compress-Create-paste", this is too impersonal.It can be easily implemented with

Use socket. io and node. js to build a timely communication system, socket. ionode. jsSocket. IO is a websocket library, including the client js and the server nodejs. Official Address: http://socket.ioUse socket. io and nodejs to build a websocket ServerSocket. io can not only build the websocket service of the client

This article mainly introduces the use of Node-based. js build tool Grunt to release ASP. the NETMVC project tutorial and automated build tool Grunt has compilation, compression, unit testing, and other functions. It is very powerful. If you need it, refer to the following. Grunt IntroductionGrunt is a construction tool based on

Use Meteor with Node. js to compile a real-time chat application example, meteornode. js I often see Derby. the framework for js comparison is Meteor. js. similar to Derby, it can also update views in real time on multiple clients

Node. JS has been very popular recently, not only the open-source community is very concerned about it, but Microsoft has even provided official support for it to make node. JS can also run on Windows, Which is node. the further popularity of

8888 Port //terminal prints the following information Console.log ( ' Server running at http:// 127.0.0.1:8888/' ); In this way, a simple HTTP Server, even if it is finished, the input node app.js can be run, and then access will see the output results.Why use node. jsFace a new technology, ask a few why is always good. Since PHP, Python, and Java can all be

First, install, download the installation from the official website, install basic always click on the next step on the line. Note: node. js is Python-based, and it is best to install Python on your computer before installing node. js, preferably Python2.7 or 2.6.Second, Cmd enters the command line, enter

Use q. js in node. js to implement api promise Here we will look at how to use q. js to implement node api promise. 　　I. Everything starts with install The Code is as follows: Npm insta

Use async and await asynchronous operations to solve the problem of fs module asynchronous read/write and synchronization results in node. js, asyncnode. js Async await solves the asynchronous problem. These two keywords are proposed by es7. Therefore, the node and browser v

); // Output a String to the console once the server starts up, lew.us know everything// Starts up correctlyConsole. log ("Random Number Generator Running ..."); Start the application Put the above code into a file named "random. js. To start the application and run it (to create an HTTP server and listen to connections on port 80), enter the following command in your command prompt: % node random.

First, block module multiplexingDefine blocks that need to be reused with blockBlock followed by the name of the module, referenced once the block content will be reused oncePost-compilation results:II, inheritance template (extends)In the actual development, the site's head, the tail is generally common, we can through the Jade template inheritance (extends) function, the public part of the abstraction, and then let the different pages inherit these public parts, and inherited it can also be re

Use Node. js to write basic extension methods for other programs This article describes how to use Node. js to compile extensions for other programs. The example in this article is to use