1.查看npm的镜像源
npm config get registry
// 默认是:https://registry.npmjs.org/
2.修改成淘宝的镜像源
npm config set registry https://registry.npm.taobao.org
3.create-react-app创建项目
npx create-react-app myapp
npm config get registry
// 默认是:https://registry.npmjs.org/
npm config set registry https://registry.npm.taobao.org
npx create-react-app myapp