8000 IFFE module target · Issue #7671 · microsoft/TypeScript · GitHub
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IFFE module target #7671
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@TheToolbox

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@TheToolbox

Would anyone be interested in a PR for bundling ES6 modules into single IFFE-scoped files? (a la rollup.js) This would allow bundling for those who don't wish to rely on AMD/System, and remove at least one build step in many scenarios.

(Apologies if duplicate. Search/FAQ didn't come up with anything. If additional details are desired, I can put those together as well)

Example below (modified from rollupjs's website):

//main.ts (source)
import * as x from './maths';
var z : number = 3;
console.log( x.cube( 5 ) + z ); 
//maths.ts (source)
//variable namespacing could be accomplished by appending, as seen here, or via internal IFFEs
var z : number = 0;

export function square ( x : number ): number {
    return x * x + z;
}

//unreferenced functions intelligently culled
export function cube ( x : number ): number {
    return x * x * x + z;
}
//main.js (outFile)
(function () {
    'use strict';

    //variable namespacing could be accomplished by appending, as seen here, or via internal IFFEs
    var z$1 = 0;

    //unreferenced functions intelligently culled
    function cube ( x ) {
        return x * x * x + z$1;
    }

    var z = 3;
    console.log( cube( 5 ) + z );

}());

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