1、npm

设置为淘宝源：

npm config set registry http://registry.npm.taobao.org/

设置为默认源：

npm config set registry https://registry.npmjs.org/

2、yarn

设置为淘宝源：

yarn config set registry https://registry.npm.taobao.org

设置为默认源：

yarn config set registry https://registry.yarnpkg.com