javascript - After node is installed, npm always reports that it is not an internal command. How to solve it?

Question

Overview

• win10 system

• Tried multiple versions of node

Question 1: The following error keeps reporting!

Problem 2: npm can install dependent packages, but it cannot run. For example, npm run dev, the following error will be reported

Answer 1

It should be that the environment variables are not set properly.
You can refer to here:/a/11...

Answer 2

npm run dev must be run in the directory with package.json

Answer 3

The directory is not entered, right?

Answer 4

添加系统环境变量,选择安装的node目录

用户环境变量，也就是其他npm包的位置

Answer 5

I guess it’s because the command line tool you have is not working properly. Don’t use the one that comes with node. Try using cmd

Answer 6

Create a new user variable NODE_PATH in Advanced System Settings-Environment Variables
Value C:Program Filesnodejsnode_modules

Answer 7

Does your node have environment variables?