windows下引入axios碰到的怪问题
今天安装axios到vuejs下面，出现了一个奇怪的问题，记录下备忘！

D:\wamp64\www\tools\first-vue>npm install axios --save

npm ERR! path D:\wamp64\www\tools\first-vue\node_modules\fsevents\node_modules\dashdash\node_modules

npm ERR! code EPERM

npm ERR! errno -4048

npm ERR! syscall scandir

npm ERR! Error: EPERM: operation not permitted, scandir 'D:\wamp64\www\tools\first-vue\node_modules\fsevents\node_modules\dashdash\node_modules'

npm ERR!  { Error: EPERM: operation not permitted, scandir 'D:\wamp64\www\tools\first-vue\node_modules\fsevents\node_modules\dashdash\node_modules'

npm ERR!   stack: 'Error: EPERM: operation not permitted, scandir \'D:\wamp64\www\tools\first-vue\node_modules\fsevents\node_modules\dashdash\node_modules\'',

npm ERR!   errno: -4048,

npm ERR!   code: 'EPERM',

npm ERR!   syscall: 'scandir',

npm ERR!   path: 'D:\wamp64\www\tools\first-vue\node_modules\fsevents\node_modules\dashdash\node_modules' }

npm ERR!

npm ERR! Please try running this command again as root/Administrator.

npm ERR! A complete log of this run can be found in:

npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache_logs\2017-11-12T072809_076Z-debug.log

不知道什么原因，关闭所有first-vue目录下面相关的程序，再来

D:\wamp64\www\tools\first-vue>npm install axios --save

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.3 (node_modules\fsevents):

npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.3: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

- axios@0.17.1
  added 115 packages and updated 1 package in 15.923s

D:\wamp64\www\tools\first-vue>

成功！真奇怪了。。。