node js console debug

Recently written program node. data storage is required for js programs. there are many databases that js can use, such as mongodb and MySQL. However, I still think these databases are too large to be useful, making them more troublesome. So I found node-tiny, a non-relational data... SyntaxHighlighter. all Recently wr

Most of the node. JS-based apps are executed in the browser,For example, powerful debugging tools Node-inspector.Node-inspector is an open source online debugging tool based entirely on node. JS, providing powerful debugging capabilities and friendlyUser interface, it is ver

Analysis on the use of Stream API in Node. js, node. jsstream This article introduces the node. js stream api from a simple perspective. For more information, see the following. Basic Introduction In Node.

The console of the browser is the most important panel, the main function is to display the page loading process to generate a variety of information.Display informationConsole.log (' Hello World '); Console.debug (' Debug '); Console.info (' information '); Console.error (' Error '); Console.warn (' warning ');The most common is the console.log .Placeholderconsoleobjects can also use printf-style placehold

, function (res) {var html = ''; res. on ('data', function (data) {html + = data;}) res. on ('end', function () {var courseData = filterChapter (html); printCourseInfo (courseData );})}). on ('error', function () {console. log ('course data retrieval error ');}) References:Https://github.com/alsotang/node-lessons/tree/master/lesson3 Http://www.imooc.com/video/7965 Articles you may be interested in: Full p

Module) Stability: 5-locked Node has a simple module loading mechanism. The files and modules in node correspond one to one. For example, foo. js loads the circle. js module in the same folder. Foo. js content: [Javascript]Console

This article is based on the current Chrome stable version (19.0.1084.52 m), because Google is also constantly refining the chrome developer tool, so the chrome version may differ slightly. Some of the shortcut keys are also on Windows, and the Mac should be similar.Regular breakpoints related to breakpoint/conditional-breakpoint/call-stack/watch-expressions etc. are not involved.1. Beautify JavascriptJS files are generally compressed before they go online, and the compressed JavaScript is almos

Details about the Async and Await functions in Node. js, node. jsasync In this article, you will learn how to use the async function (async/await) in Node. js to simplify callback or Promise. Asynchronous language structure already exists in other languages, such as c #'s as

Use Javascript Generators in Node. js for details, node. jsgenerators Generators is a collaborative program (coroutine for short: coroutine) style in Javascript. It refers to the functions that can be paused and restored during execution, this function is configured with a star symbol in functi, such as function *. Some feature keywords in the function, such as y

Node. js ~ Deployment on linux and node. jslinux The following uses centOS as an example to deploy the node. js environment. Start centos and download the node. js package. curl --silen

Node is a Javascript runtime environment ). In fact, it encapsulates the GoogleV8 engine. The V8 engine executes Javascript very quickly and performs very well. Node has optimized some special use cases and provided alternative APIs, so that V8 can run better in a non-browser environment in the ubuntu system environment and simply record the process. First install the database with apt-get, type the comman

, index) {return new Promise (function (resolve, reject) {fs. readFile (file, 'utf-8', function (err, str) {if (! Err) {resolve (str)} else {reject (err) }}) ;}); return Promise. all (readFilsePromiseList );}). then (function (fileStrArray) {console. log ('after reading the so-called file: '+ fileStrArray );}); This Code indeed shows the elegance of nodejs development. So where is the problem? Currently, the elegant language still relies on the operat

General Information Console.info (), Error-console.debug (), Warning Console.warn (), Error prompts Console.error (). For example, insert the following four lines in a Web script: Console.info ("This is Info"); Console.debug ("This is Debug"); Console.warn ("This is warn"); Console.error ("This is Error"); When loaded, the console displays the following contents. You can see that the different nature of t

official website will provide you with the most suitable version based on your current operating system. 2.4 use Node. js to run Javascript code Create a new nodeproject directory and a new js file. 01_hello.js var num1 = 10;var num2 = 20;console.log(num1 + num2); On the windows console, switch the directory to the d

1. What is the breakpoint debugging? It is not difficult to be difficult. Breakpoint debugging is not really a complex thing, simple understanding is not outside the call is to open the browser, open sources find JS file, the line number on the point. The operation seems very simple, in fact, many people tangle is where to break the point. (Let's look at a screenshot of a breakpoint, for example, with a Chrome breakpoint.) Step remember not. Open t

= reqOptions. url var urlObj = url. parse (reqUrl) var options = {hostname: urlObj. hostname, port: urlObj. port, path: urlObj. pathname, headers: reqOptions. headers | |{}} var req = http. request (options, function (res) {var events es = [] var err = null var statusCode = res. statusCode var headers = res. headers var ws = fs. createWriteStream (filepath, fileOptions) ws. on ('error', function (e) {console. log ('ws error', e)}) res. on ('data', fu

"); // Select Body Node13. Copy copies the contents obtained from the console to the Clipboard by this commandcopy (document.body); Copy bodycopy (document.getElementById ("info")); Copy the node of an ID element14. The $_ command returns the results of the most recent expression execution, $0-$4 represents the last 5 DOM nodes you have selectedXV, using the

Node. js + express makes a webpage calculator, node. jsexpress Environment: HOST: WIN10 Express installation: 1. Install express-generator Enter the following command: npm install -g express-generator 2. Install express Enter the following command: npm install -g express 3. verify whether the installation is successful Enter the command: express-V View help: expr

Introduction to Node. js open-source application framework HapiJS, node. jshapijs 1. Introduction to HapiJS HapiJS is an open-source, Node-based. the js application framework is suitable for building applications and services. Its design goal is to allow developers to focus

How to debug dynamic js scripts in the browser (illustration): js scripts Two days ago, I pulled the company's front-end code and found that the sources option of the developer tool did not list the js script I want to debug. Then I observed it, the script is dynamically in