webpack不能在我的角度JS

Question

我想在webpack配置期间设置API URL。

尝试这样：

plugins.push(
            new HtmlWebpackPlugin({
                hash: true,
                filename: 'index.html',
                template:  './src/index.ejs',
                inject : false
            }),
            // Write out CSS bundle to its own file:
            new ExtractTextPlugin({
                filename: 'css/styles.css',
                allChunks: true
            }),

            new webpack.DefinePlugin({
                'process.env.API':  'api'
            })
        );

然后在我的JS中尝试将其称为

const accountCentreAPI = process.env.API;

但是得到如下错误：

 http://localhost:8080/
webpack result is served from http://localhost:8080/
content is served from ./src
webpack: wait until bundle finished: /
{ SyntaxError: Unexpected token (1:49)
    at Parser.pp$4.raise (F:\src\Client\node_modules\acorn\dist\acorn.js:2221:15)
    at Parser.pp.unexpected (F:\src\Client\node_modules\acorn\dist\acorn.js:603:10)
    at Parser.pp$3.parseExprAtom (F:\src\Client\node_modules\acorn\dist\acorn.js:1822:12)

我的网络版 版本：webpack 2.1.0-beta.22

注意一切正常，直到我在我的webpack中添加了DefinePlugin并尝试在我的js中调用process.env。