javascript - 我用babel编译js的时候没有定义Proxy

Question

当我使用babel编译js时，config.js

var webpack = require('webpack');
var commonsPlugin = new webpack.optimize.CommonsChunkPlugin('common.js');

module.exports = {
    entry: {
        Index: './index.js',
        Test: './test.js'
    },
    output: {
        path: __dirname,
        filename: '[name].js' // Template based on keys in entry above
    },
    module: {
        loaders: [
            {
              test: /\.js(x?)$/,
              loader: 'babel-loader',
              query: {
                presets: ['es2015']
              }
            }
        ]
    },
    plugins: [commonsPlugin]
};

我的入口js只是console.log(new Proxy());，在chrome中会报错Uncaught ReferenceError: Proxy is not defined。

我确定js已经编译好了，但是为什么babel编译后没有定义Proxy？

Answer 1

babeljs 目前不支持代理。

来自他们的 website :

Unsupported feature
Due to the limitations of ES5, Proxies cannot be transpiled or polyfilled. See support in various JavaScript engines.