nrm 查看下载源下载nrm :npm install -g nrm查看npm下载源:nrm ls设置下载源：（最好使用npm源或者淘宝源）nrm use taobaonpm config get registry // 查看是否设置成功npm config set registry https://registry.npm.taobao.orgnpm config get registry例子：npm config set registry http://registry.npmjs.org 或者 nrm use npm