为什么安装webpack后提示不是内部命令？ npm安装webpack,运行webpack-v，提示nod...
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npm i webpack -g
因为安装步骤出现了问题。
1.首先你需要安装一个全局的webpack；
npm install webpack -g；
这样你才可以正确的使用webpack这个命令；
2.然后, 你还可以在当前项目里面也安装一个webpack, 这也是官方推荐的做法；
npm install webpack --save-dev；
这样就可以在你的webpack.config.js里面方便的引用webpack；
// webpack.config.js；
var path = require('path');
var webpack = require('webpack');
3.然后在使用一些plugin的时候就比较方便了；
new webpack.optimize.CommonsChunkPlugin('common.js')。
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