将 TypeScript 导入 ES6

Question

伙计们。我在将 TypeScript 转换为 JavaScript 时遇到了一些小问题。

我有这个代码

import { someMethod } from 'someModule'

function *someGeneratorFunction(object : someObject) {
    someMethod();
}

当我尝试将其转换为 ES5 时，我遇到了一个问题：ES5 标准不支持生成器函数。而import 正在转换为require

但是当我将此代码转换为 ES6 时，import 出现问题。 Bcoz' 它不会转换为require。它仍然像import。

但稳定节点不支持import 构造。在这种情况下我能做什么？

我需要使用这个方案：TypeScript->ES6->ES5（通过 Babel）吗？还是有别的方法？

Answer 1

在这种情况下我能做什么？

你可以告诉 TypeScript 你想使用哪个模块系统。来自documentation：

要编译，我们必须在命令行上指定一个模块目标。对于 Node.js，使用--module commonjs；对于require.js，使用--module amd

tsc --module commonjs Test.ts

Answer 2

我通常使用这种配置..

用于转换我的 tsconfig.json 的打字稿：

{
  "compilerOptions": {
    "outDir": "app_build/",
    "target": "es6", // <-- TARGETING ES6
    "module": "commonjs",
    "moduleResolution": "node",
    "lib": [
      "es5",
      "dom"
    ],
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": false
  },
  "compileOnSave": true,
  "exclude": [
    "node_modules",
    "app_build/js",
    "typings/main",
    "typings/main.d.ts"
  ]
}

我的 Webpack 开发文件（webpack.dev.js）：

var ExtractTextPlugin = require("extract-text-webpack-plugin");
var webpack = require("webpack");
var HtmlWebpackPlugin = require("html-webpack-plugin");
var CleanWebpackPlugin = require('clean-webpack-plugin');
var path = require('path');

module.exports = {
    entry: {
        "polyfills": "./polyfills.ts",
        "vendor": "./vendor.ts",
        "app": "./app/main.ts",

    },
    resolve: {
        extensions: ['', '.ts', '.js', '.json', '.css', '.scss', '.html']
    },
    output: {
        path: "./app_build",
        filename: "js/[name]-[hash:8].bundle.js"
    },
    devtool: 'source-map',
    module: {
        loaders: [
            {
                loader: "babel-loader",

                // Skip any files outside of your project's `src` directory

                exclude: [
                  path.resolve(__dirname, "node_modules")
                ],
                // Only run `.js` and `.jsx` files through Babel
                test: /\.js/,

                // Options to configure babel with
                query: {
                    plugins: ['transform-runtime', 'babel-plugin-transform-async-to-generator'],
                    presets: ['es2015', 'stage-0'], //<-- BABEL TRANSPILE
                }
            },
            {
                test: /\.ts$/,
                loader: "ts"
            },
            {
                test: /\.html$/,
                loader: "html"
            },
            //{
            //    test: /\.(png|jpg|gif|ico|woff|woff2|ttf|svg|eot)$/,
            //    loader: "file?name=assets/[name]-[hash:6].[ext]",
            //},
            {
                test: /\.(png|jpg|gif|ico)$/,
                //include:  path.resolve(__dirname, "assets/img"),
                loader: 'file?name=/assets/img/[name]-[hash:6].[ext]'
            },
            {
                test: /\.(woff|woff2|eot|ttf|svg)$/,
              //  exclude: /node_modules/,
                loader: 'file?name=/assets/fonts/[name].[ext]'
            },
            // Load css files which are required in vendor.ts
            {
                test: /\.css$/,
                loader: "style-loader!css-loader"
            },
            {
                test: /\.scss$/,
                loader: ExtractTextPlugin.extract('css!sass')
            },
        ]
    },
    plugins: [
        new ExtractTextPlugin("css/[name]-[hash:8].bundle.css", { allChunks: true }),
        new webpack.optimize.CommonsChunkPlugin({
            name: ["app", "vendor", "polyfills"]
        }),
        new CleanWebpackPlugin(
            [
                "./app_build/js/",
                "./app_build/css/",
                "./app_build/assets/",
                "./app_build/index.html"
            ]
        ),
        // inject in index.html
        new HtmlWebpackPlugin({
            template: "./index.html",
            inject: "body",
            //minifyJS: true,
            //minifyCSS: true,
        }),
        new webpack.ProvidePlugin({
            jQuery: 'jquery',
            $: 'jquery',
            jquery: 'jquery'
        })
    ],
    devServer: {
        //contentBase: path.resolve(__dirname, "app_build/"),
        historyApiFallback: true,
        stats: "minimal"
    }
};

我将它用于 Angular 2 项目.. 希望它对你有所帮助