Mac

1、Resolving EACCES permissions errors when installing packages globally

1）Back up your computer.

2）On the command line, in your home directory, create a directory for global installations:

mkdir ~/.npm-global

3）Configure npm to use the new directory path:

npm config set prefix '~/.npm-global'

4）In your preferred text editor, open or create a ~/.profile file and add this line:

export PATH=~/.npm-global/bin:$PATH

5）On the command line, update your system variables:

source ~/.profile

6）To test your new configuration, install a package globally without using sudo:

npm install -g jshint

2、npm install出现”Unexpected end of JSON input while parsing near”的错误

运行  npm cache clean --force

3、Module build failed: Error: Cannot find module 'node-sass’解决

         npm install node-sass --save-dev

4、vue中lang="scss"

npm install sass-loader@7.3.1 --save-dev// 注意版本号，否则会因为版本号过高而报错

npm install --save-dev node-sass