在安装npm时得到警告

Question

npm WARN extract-text-webpack-plugin@1.0.1 requires a peer of webpack@^1.9.11 but none is installed. You must install peer dependencies yourself. 
npm WARN karma-webpack@1.7.0 requires a peer of webpack@^1.4.0 but none is installed. You must install peer dependencies yourself. 
npm WARN react-native@0.49.2 requires a peer of react@16.0.0-beta.5 but none is installed. You must install peer dependencies yourself. 
npm WARN sass-loader@3.2.0 requires a peer of webpack@^1.12.6 but none is installed. You must install peer dependencies yourself. 
npm WARN webpack-dev-middleware@1.12.0 requires a peer of webpack@^1.0.0 || ^2.0.0 || ^3.0.0 but none is installed. You must install peer dependencies yourself. 
npm WARN webpack-dev-server@2.0.0-beta requires a peer of webpack@>=2.0.3-beta <3 but none is installed. You must install peer dependencies yourself. 
npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.1.2 (node_modules\fsevents): 
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.1.2: wanted {"os":"darwin","arch":"any"} (current: {"os":"win32","arch":"x64"}) 

我在做npm安装时遇到了上面提到的警告。虽然，这些只是警告，并不会影响应用程序。但是，我想知道导致这些警告的是什么。

I am using npm `version 5.4.2` 
node version is 6.11.4 
webpack 2.1.0-beta.22 

Answer 1

首先去年2个警告只是针对谁使用 比Mac和其他的用户。（即使我没能解决这些问题）

现在来其它警告。

您可以降级您的webpack版本或将所有内容升级到最新版本。

它们是互相兼容的，因为我也这样做过。

在我看来，升级所有组件是解决此问题的更好方法。

同时升级它npm-check