alert is not defined node js

In the process of writing a project, need to use real-time data push demand, so first think of the Nodejs websocket moduleFind an example of a chat room on the internet and then change it to a push for your needsSome of the problems encounteredReturn data problem: Due to Nodejs is not very familiar with the use of lazy data processing and so on the PHP back-end processing and then use Nodejs to request and then found in the process of the request back

The querystring. unescape method in node. js is described as follows: Method description: This method can be used to override querystring. parse. Syntax: Copy codeThe Code is as follows:Querystring. unescape Receiving parameters: None Source code: Copy codeThe Code is as fol

Front-End newcomer, self-study front-end six months, is a primer. But to the back end of the ignorant, at this time want to master the Back-end knowledge, and conducive to future work, is to learn Node. js good or to learn PHP better, ask for Guidance. Don't give me two to learn, I learn a time I will know the othe

Label:selecterrohandretdes leaseuserlogmysq var Generic_pool = require (' Generic-pool '); var pool = Generic_pool. Pool ({ name: ' MySQL ', max:10, Create:function (callback) { var Client = require (' mysql '). CreateConnection ({ Host: ' 127.0.0.1 ', nbsp ; User: ' Root ', Password: ' 123456 ', database: ' Weibo_gs ' }); callback (null,client); destroy:function (db) { db.disconnect (); }}); Pool.acquire (err, client) { if (err) { //Handle er

Installation of 1.node.jsWindows platform:Windows X64:current version:v4.1.0 https://nodejs.org/en/Note: (The new. msi installer already contains NPM by default)2.node.js Modules installation (The following are common modules)Cli-color Https://www.npmjs.com/package/cli-colorinstallation command:npm install cli-colorEvents Https://www.npmjs.com/package/eventsinstallation command:NPM Install EventsExpress Https://www.npmjs.com/package/expressinstallation command:NPM Install ExpressLog4js Https://w

var Generic_pool = require (' Generic-pool '); var pool = Generic_pool. Pool ({ name: ' MySQL ', max:10, Create:function (callback) { NB Sp var Client = require (' mysql '). CreateConnection ({ Host: ' 127.0.0.1 ', User: ' Root ', Password: ' 123456 ', NBSP;N Bsp database: ' Weibo_gs ' }); CA Llback (null,client); }, destroy:function (db) { db.disconnect (); nbsp }) pool.acquire (function (err, client) { if (err) { //Handle ERROR- This was generally the err

Yesterday the company wanted to write a multiple-group voting system that asked the front desk to judge before submitting the content to the server script, so it came out of the question. Here we will come to JS to determine whether the selection box [Radio] _ selected code. Above is a simple radio group, let's see how JS

and when you access the url corresponding to this file, php will automatically help you run this php script. So you can save a lot of work. For websites, everything php provides is perfect (so many companies are using it). You don't need to consider the underlying things at all. Concentrate on the application layer. When your programming experience reaches a certain level, you feel that you want to write a web server (Like apache), php cannot do it

Cause the command tool was split up in the latest express4.0 releaseMethod One: Uninstall the latest version to add the old versionUninstall: NPM Uninstall-g ExpressInstall the specified version: NPM install-g [email protected]View version: Express-vNote that the V in Express-v is capitalized, otherwise it will not be recognized in many versionsMethod Two: Use the new versionInstall a command tool with the following command:NPM install-g Express-gener

This time has been looking at the express framework of the API, recently saw router, the following is what I think need to be aware of the place:Router module has a Param method, just start to look a little vague, the official website is probably described as follows: 1 Map logic to route parameters. It probably means that the mapping logic of the route parameterThis may be 1