node js debug breakpoint

Description of the fs. exists method in node. js, node. jsfs. exists Method description: Test whether a file in a path exists. The callback function contains an exists parameter. If the value is true, the object exists. Otherwise, the value is false. Syntax: Copy codeThe Code is as follows:Fs. exists (path, callback) Because this method belongs to the fs mo

node. JS supports single-step debugging under the command line. The following is a simple program:var a = 1;var B = ' world '; var c = function (x) {console.log (' hello ' + x + a);}; C (b);Executing node debug debug.js at the command line will start the debugging tool:650) this.width=650; "src=" Http://s3.51cto.com/wy

1. Debugger; As I've said before, you can add a sentence to the JavaScript code debugger; to create a breakpoint effect manually.Do you want a breakpoint with a condition? You just need to if surround it with statements: Copy Code code as follows: if (Somethinghappens) { Debugger } But remember to remove them before the program is released. 2. Set trigger

disableadvancedoptimizations-selectorpropertymerging, reduction,etc.compatibility-forcecompatibilitymodetoie7 orie8.Defaultstonotset.debug-settotrue Togetminificationstatisticsunderstatsproperty (seetest/custom-test.jsforexamples) */ Functioncssminifier (filein,fileout) {varorigCode= " ,finalcode=[];for (vari=0;i Perform compression Node Compress.js can perform compression manually You can also write to the batch comman

icon in the upper right corner. Next, debug the Aptana debug functions. If the function panel cannot be found on the debug interface, add it to show view under the window menu. Step 1: Add a breakpoint. Double-click the row number and double-click Delete] Step 2: Click the

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

shown in the following code snippet. $ npm lshello-world@0.0.1 /private/tmp└─┬ express@3.0.0beta7 ├── commander@0.6.1 ├─┬ connect@2.3.9 │ ├── bytes@0.1.0 │ ├── cookie@0.0.4 │ ├── crc@0.2.0 │ ├── formidable@1.0.11 │ └── qs@0.4.2 ├── cookie@0.0.3 ├── debug@0.7.0 ├── fresh@0.1.0 ├── methods@0.0.1 ├── mkdirp@0.3.3 ├── range-parser@0.0.4 ├─┬ response-send@0.0.1 │ └── crc@0.2.0 └─┬ send@0.0.3 └── mime@1.2.6 Now create the application itself! Create a fi

create the folder like so: Mkdir-r C:\USERS\SOMEUSER\APPDATA\ROAMING\NPMWhy use Visual Studio 2013? Node Tools for Visual studio!With node. js installed, it ' s time to select a development tool. Of course, you is free to use any editing tool want and why use a glorified notepad when you can experience the full Power of Enterprise-grade integrated development en

return object containing the ' Promise ' method, which provides a final return value, very gracefully linking javascripts Async with node. js. For example, taken from Q's repo page. Promisemesomething () . Then (function (value) { }, function (reason) { }); Copy Code The Promise Me method correctly returns an object that will be called when the value is passed in, and it provide

) + '\ n');} var warn = function () {writeerror (format. apply (this, arguments) + '\ n');} var error = function () {writeerror (format. apply (this, arguments) + '\ n');} var dir = function (object) {var util = require ('util'); process. stdout. write (UT Il. inspect (object) + '\ n');} var time = function (Label) {Times [label] = date. now ();} var timeend = function (Label) {var duration = date. now ()-Times [label]; exports. log ('undefined: nanm', label, duration);} var trace = function (La

Environment: Visual Studio Code node. js1. Close the Running program2, open the portal file, I here the entry file for App.js3. Click the Debug button on the left menu bar4. Click the Run button5. Open the console and pull it up.Select Debug Console6. Place a red dot where a breakpoint is needed7. Running the programWe

JS Debug Series Directory:- If you look at 1, 22, you should have a preliminary understanding of the console, today we have a simple debugging.The three after-school exercises that were left yesterday are pretty much what we are going to talk about today.Let's deal with the first question first:1. Review the functions called by this function under the article recommended source codeActually very simpl

multiple ports3.2, open more than one process to listen to the same port, using the cluster module4, open Source component library quality is uneven, update fast, downward incompatible5, Debug inconvenient, error does not stack traceThird, suitable for node JS scene1. Restful APIThis is Nodejs ideal application scenario, can handle tens of thousands of connectio

= function (object ){Var util = require ('til ');Process. stdout. write (util. inspect (object) + '\ n ');}Var time = function (label ){Times [label] = Date. now ();}Var timeEnd = function (label ){Var duration = Date. now ()-times [label];Exports. log ('undefined: nanm', label, duration );}Var trace = function (label ){// TODO probably can to do this better with V8's debug object once that is// Exposed.Var err = new Error;Err. name = 'track ';Err. m

');}Var dir = function (object ){Var util = require ('til ');Process. stdout. write (util. inspect (object) + '\ n ');}Var time = function (label ){Times [label] = Date. now ();}Var timeEnd = function (label ){Var duration = Date. now ()-times [label];Exports. log ('undefined: nanm', label, duration );}Var trace = function (label ){// TODO probably can to do this better with V8's debug object once that is// Exposed.Var err = new Error;Err. name = 'tr