安裝npm cnpm

打開官網https://www.npmjs.com/get-npm

Install npm

npm is installed with Node.js

npm is distributed with Node.js- which means that when you download Node.js, you automatically get npm installed on your computer.

下載下傳安裝好node.js（NPM 順便會安裝好）

Check that you have node and npm installed

To check if you have Node.js installed, run this command in your terminal:

輸入指令： node -v
           

To confirm that you have npm installed you can run this command in your terminal:

輸入指令： npm -v
           

update npm versions

npm versions

npm is a separate project from Node.js, and tends to update more frequently. As a result, even if you’ve just downloaded Node.js (and therefore npm), you’ll probably need to update your npm. Luckily, npm knows how to update itself! To update your npm, type this into your terminal:

npm install [email protected] -g
           

（npm轉 cnpm 可選可不選，速度可能會快一些）

npm install -g cnpm --registry=https://registry.npm.taobao.org