如何在 Typescript 中为 webpack.config.ts 创建一个 switch case？

Question

我在使用 typescript 和 webpack 2 配置文件时遇到语法问题：

javascript 等价于：

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 需要一个 TS 配置文件，所以我尝试将这部分更改为：

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';
}

我收到错误："an export declaration can only be used in a module"。但我不清楚这意味着什么。我怎样才能在打字稿中更正这个？还是这不是在 webpack 2 中构建配置的方式？

Answer 1

Typescript 仅支持顶级import/export。

尝试

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;

如何在 Typescript 中为 webpack.config.ts 创建一个 switch case？

How to make a switch case in Typescript for the webpack.config.ts?

javascript

typescript

webpack-2