安装Node.js和更新npm

安装Node.js

If you're using Mac or Windows, the best way to install Node.js is to use one of the installers from nodejs.org. If you're using Linux, you can use the installer, or you can check NodeSource's binary distributions to see whether or not there's a more recent version that works with your system.

Test: Run node -v. The version should be higher than v0.10.32.

更新npm

Node comes with npm installed so you should have a version of npm. However, npm gets updated more frequently than Node does, so you'll want to make sure it's the latest version.

sudo npm install npm -g

Test: Run npm -v. The version should be higher than 2.1.8.