Installing the node. JS module with NPM and debugging

Npm

NPM, as a package manager for node. JS, is a frequently used tool.

Note: To install a framework globally, you need to add the parameter-G

NPM Install-g Express

After installation

You only need to import the package in the project

var http = require (' http ');

Debugging

The simplest way to debug node is Console.log (), but sometimes it takes one step to debug

1. Write debugger where debugging is required

2. Node Debug *.js
   

The test command in node:

Next,n: Single Step execution

Cont,c: Continue execution until the next breakpoint is encountered

Step,s: Stepping and entering functions

Out,o: Jumping out of a function

Watch: Add expression expressions to the watch list

Installing the node. JS module with NPM and debugging