‘js@https://registry.npmmirror.com/JS/-/JS-0.1.0.tgz‘ is not in this registry

解决方法：

1. npm cache clean --force

2.临时切换到官方源

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

npm install js@0.1.0

npm config set registry https://registry.npmmirror.com/ # 切换回镜像源