npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules\fsevents

npm notice created a lockfile as package-lock.json. You should commit this file. 
npm WARN [email protected] had bundled packages that do not match the required version(s). They have been replaced with non-bundled versions. 
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: [email protected] (node_modules\fsevents): 
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for [email protected]: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

   FSevents是mac osx系统的，在win或者Linux下使用了 所以会有警告，忽略即可。