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介绍下 npm 模块安装机制，为什么输入 npm install 就可以自动安装对应的模块？ #40

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Rashomon511 opened this issue Apr 1, 2019 · 0 comments

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Rashomon511 commented Apr 1, 2019

1. npm 模块安装机制：
  *发出npm install命令
- 查询node_modules目录之中是否已经存在指定模块
  若存在，不再重新安装
  若不存在
  - npm 向 registry 查询模块压缩包的网址
  - 下载压缩包，存放在根目录下的.npm目录里
  - 解压压缩包到当前项目的node_modules目录

Rashomon511 changed the title ~~第二十一题：介绍下 npm 模块安装机制，为什么输入 npm install 就可以自动安装对应的模块？~~ 介绍下 npm 模块安装机制，为什么输入 npm install 就可以自动安装对应的模块？

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