Javascript 如何在webpack.config.ts的Typescript中创建开关大小写？

typescript和webpack 2配置文件的语法有问题：

javascript等价物是：

switch (process.env.BUILD_ENV) {
    case 'live':
        module.exports = require('./config/webpack.live');
        break;
    case 'debug':
        module.exports = require('./config/webpack.debug');
        break;
    default:
        module.exports = require('./config/webpack.doesntexist');
}

Webpack 2采用TS配置文件，因此我尝试将此部分更改为：

switch (process.env.BUILD_ENV) {
case 'live':
    export * from './config/webpack.live';
    break;
case 'debug':
    export * from './config/webpack.debug';
    break;
default:
    export * from './config/webpack.doesntexist';
}

---

我得到一个错误：“导出声明只能在模块中使用”。但我不清楚这意味着什么。如何在typescript中更正此问题？或者这不是在webpack 2中构建配置的方法吗？

Typescript只支持顶级导入/导出

试一试

---

它是一个json文件，不是js

import * as liveConfig from "./config/webpack.live";
import * as debugConfig from "./config/webpack.debug";
import * as defaultConfig from "./config/webpack.doesntexist";

let config;

switch (process.env.BUILD_ENV) {
    case 'live':
        config = liveConfig;
        break;
    case 'debug':
        config = debugConfig;
        break;
    default:
        config = defaultConfig;
}

export = config;