nodejs安装第三方模块

比如安装protobufjs

1.查看最近版本view

$ npm view protobufjs

列出最近结果：

dist-tags: latest: 6.10.1 next: 6.10.1-beta.0

2..安装指定版本install

$ npm install protobufjs@6.10.1 -g

结果：

andrew@DESKTOP-P49JS9I /cygdrive/e/study/game/egret/test_websocket $ npm install protobufjs@6.10.1 -g C:\Users\andrew\AppData\Roaming\npm\pbjs -> C:\Users\andrew\AppData\Roaming\npm\node_modules\protobufjs\bin\pbjs C:\Users\andrew\AppData\Roaming\npm\pbts -> C:\Users\andrew\AppData\Roaming\npm\node_modules\protobufjs\bin\pbts > protobufjs@6.10.1 postinstall C:\Users\andrew\AppData\Roaming\npm\node_modules\protobufjs > node scripts/postinstall + protobufjs@6.10.1 added 14 packages from 46 contributors in 3.563s