babel ie8 new Class throw 'Cannot call a class as a function'

webpack.config.js：

            {
                test: /\.js[x]?$/,
                exclude: /(node_modules|bower_components)/, 
                loader: 'babel',
                query: {
                    presets: ['es2015-loose', 'stage-0'], 
                    cacheDirectory: true, 
                    //cacheIdentifier : '.babelrc', 
                    plugins: ['transform-runtime']
                }
            }

js：

import "babel-polyfill";
class CC{
    constructor(x, y) {
        this.x = x;
        this.y = y;
    }
}
var c1 = new CC(1,2);

前辈门有没有遇到这种问题呢?

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参考一下这篇文章：使用 ES6 的浏览器兼容性问题,我现在也在坑中，只能帮你到这儿了。