如何连接ES6模块? [英] How do I concatenate ES6 modules?
问题描述
如何连接ES6模块?
var foo = 2; // This would normally be scoped to the module.
export function Bar() {}
// ...concatenate...
import { Bar } from 'javascripts/bar' //This file no longer exists in the concatenated scenario.
export function Bam() {}
推荐答案
如果您想要做的是创建一个不内部使用ES6模块的单一JavaScript文件,以便您可以在今天使用浏览器/节点,那么我建议使用世界语(全面披露,我是项目的维护者)。它允许您创建一个捆绑,将所有文件连接在一起而不使用加载器,就像使用像browserify或webpack一样。这通常会导致更小的代码(无加载器),更好的死代码消除(使用像Google Closure Compiler或UglifyJS这样的分解器时),以及更好的性能,因为JS解释器能够更好地优化结果。
If what you want to do is create a single JavaScript file that does not internally use ES6 modules, so that you can use it with browsers/node today, then I recommend using Esperanto (full disclosure, I'm a maintainer of the project). It allows you to create a bundle that concatenates all of the files together without the use of a loader like you'd get using something like browserify or webpack. This typically results in smaller code (no loader), better dead code elimination (when using a minifier like Google Closure Compiler or UglifyJS), and better performance as the JS interpreter is better able to optimize the result.
以下是一个示例用法,但请注意,大量可集成的工具世界语进入您的工作流程:
Here's an example usage, but note that there are plenty of tools to integrate Esperanto into your workflow:
var fs = require( 'fs' );
var esperanto = require( 'esperanto' );
esperanto.bundle({
base: 'src', // optional, defaults to current dir
entry: 'mean.js' // the '.js' is optional
}).then( function ( bundle ) {
var cjs = bundle.toCjs();
fs.writeFile( 'dist/mean.js', cjs.code );
});
此示例取自在捆绑ES6模块的wiki页面。
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