1、组件：

import { Component } from '@angular/core';

@Component({
    selector: 'app',
    template: require('./app.component.html'),
    styles: [ require('./app.component.scss') ]
})
export default class AppComponent{

}

2、在webpack中的配置：

...
{
    test: /\.scss$/,
    loader: ExtractTextPlugin.extract( 'style-loader', 'raw-loader!css-loader!sass-loader' ),
    exclude: /node_modules/
}
...

3、在浏览器下报Uncaught Error: Expected 'styles' to be an array of strings.

4、到底要怎么提取scss文件呢？