总结来说，不用管它。。。

我在安装的时候报错说：

npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! chromedriver@2.42.0 install: `node install.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the chromedriver@2.42.0 install script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2018-10-14T05_17_53_483Z-debug.log

解决办法就是 npm install chromedriver -g 

然后正常用，没发现有什么不一样的