将ES6模块导入全局范围

Question

TLDR : How can I make a module (imported via ES6 syntax) globally scoped (or reference an imported class inside another class)?

---

I'm importing a module from a package which wasn't implemented properly (no export etc) but am running into some issues.

What I am doing is using var to set the module to global (not great) eg

var Example = require('./node_modules/example/long_path_to_file.js');

As I need to use it like so in my class (the module takes control of this and class instances aren't available in the global scope so I can't use my class as I normally would):

new window.Example(...)

This works but it isn't great as I'm using webpack and would prefer to use the proper es6 syntax

import Example from './example';

and then in example.js

export default Example = require('./node_modules/example/long_path_to_file.js');

However this means it is no longer global scoped, and I'm unable to find a fix.

I've tried things like window.Example = Example but it doesn't work.

Answer 1

If you are using webpack it's easy to setup it. So here is a simple example how to implement it.

webpack.config.js

module.exports = {
  entry: 'test.js',
  output: {
    filename: 'bundle.js',
    path: 'home',
    library: 'home' // it assigns this module to the global (window) object
  }
  ...
}

some.html

<script>console.log(home)</script>

Also if you open your bundle.js file you will see how webpack did it for you.

var home =  // main point
/*****/ (function(modules) blablabla)
...

Also i suggest look at webpack library configuration.

I hope it will help you.

Thanks

Answer 2

I've done some testing and this works correctly:

import './middleman';

// './middleman.js'
window.Example = require('./example.js').default
// OR
window.Example = require('./example.js').Example

// './example.js'
export function Example() {
  this.name = 'Example'
}
export { Example as default }