npm 模块安装机制简介 - 阮一峰的网络日志



npm 模块安装机制简介 - 阮一峰的网络日志

正因为有了npm,我们只要一行命令,就能安装别人写好的模块 。

 $ npm install  

本文介绍 npm 模块安装机制的细节,以及如何解决安装速度慢的问题。

一、从 npm install 说起

npm install 命令用来安装模块到node_modules目录。

 $ npm install <packageName> 

安装之前,npm install会先检查,node_modules目录之中是否已经存在指定模块。如果存在,就不再重新安装了,即使远程仓库已经有了一个新版本,也是如此。

如果你希望,一个模块不管是否安装过,npm 都要强制重新安装,可以使用-f--force参数。

 $ npm install <packageName> --force 


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