安装：npm install html-webpack-plugin --save-dev

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@^1.2.2 (node_modules\chokidar\node_modules\fsevents):

npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.2.4: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"})

npm WARN webpack-demo@1.0.0 No description

npm WARN webpack-demo@1.0.0 No repository field.

 这是什么原因造成的。