如何设置 Babel 以使用 ES2015 `export * as X from Y` 语法？

Question

我只想使用这个语法：

export * as Utils from './utils';

但是 Babel 说它无法解析这一行：

Module parse failed: Unexpected token (4:9)
File was processed with these loaders:
 * ../node_modules/babel-loader/lib/index.js
You may need an additional loader to handle the result of these loaders.

似乎transform-export-extensions 应该做我想做的事，但事实并非如此。

---

我使用最新的 babel 7 和 webpack 4

我的.babelrc：

{
    "presets": [
        "@babel/preset-react",
        "@babel/preset-env"
    ],
    "plugins": [
        "transform-export-extensions",
    ]
}

在 webpack 配置中我有：

...
    module: {
        rules: [
            {
                test: /\.js$/,
                use: {
                    loader: 'babel-loader'
                },
                exclude: /node_modules/
            },
...

Answer 1

我最后只是

import * as Utils from './utils';
export {Utils};