解决出口/进口

Question

I have a Namespacing.js with something like the following

(function(){

    window.GlobalObject = {
        foo : function() { console.log("bar"); }
    }

})();

Then i have another MyScript.js

GlobalObject.newAttribute = { ... }

So i'm now bundling with webpack and i was tryng to use modules on this, but i couldnt manage to do so.

At Namespacing.js i added at the end:

export default GlobalObject;

Then i tryed to import it in MyScript.js

import GlobalObject from "Namespacing"

But then my webpack gets me an error

[14:58:44] GulpUglifyError: unable to minify JavaScript
Caused by: SyntaxError: Unexpected token: name (Kneat) (line: 1, col: 7, pos: 7)

Does any1 knows a good way of doing this export/import ?

Answer 1

To switch to import / export , you can't just add exports to your existing files, you need to change their structure (ever so slightly).

For instance, Namespacing.js would have either:

export const GlobalObject = {
    foo : function() { console.log("bar"); }
};

...to export a named symbol GlobalObject . That would be imported like this:

import { GlobalObject } from './Namespacing.js';

(You could use an as clause if you wanted a different name locally in the importing module.)

Or you could export that object as the default export:

export default {
    foo : function() { console.log("bar"); }
};

...and import it like this:

import GlobalObject from './Namespacing.js';

Note that in that case, you can use any name you want for GlobalObject in the module in which you're importing it (no need for as as clause).

---

Don't worry about the fact that it involves removing the IIFE; modules are inherently scoped, module code doesn't run at global scope.