Leveraging gulp to enhance the module namespace in the TypeScript output of various files

I faced an issue when using the methodology of one file - one class in a TypeScript project, as shown in the example below.

File Greeter.ts

module App {
    export class Greeter {
        constructor(public greeting: string) { }
        public greet() {
            return "<h1>" + this.greeting + "</h1>";
        }
    };
}

File Program.ts

module App {
    export class Program {
        private _greeter = new Greeter("Hello, world!");
        public main() {
            document.body.innerHTML = this._greeter.greet();
        }
    };
}

Result file

var App;
(function (App) {
    var Greeter = (function () {
        // class code
    } ());
    App.Greeter = Greeter;
})(App || (App = {}));

var App;
(function (App) {
    var Program = (function () {
        // class code
    } ());
    App.Program = Program;
})(App || (App = {}));
// point of entry
var program = new App.Program();
program.main();

It is noticeable that there is duplication in declaring App. I want to eliminate any such repetition like this:

var App;
(function (App) {
    var Greeter = (function () {
        // class code
    } ());
    App.Greeter = Greeter;

    var Program = (function () {
        // class code
    } ());
    App.Program = Program;
})(App || (App = {}));
// point of entry
var program = new App.Program();
program.main();

When there are numerous classes, it results in unnecessary code in the output file.

Could I be making a mistake somewhere?

----Update----

The project is being built by gulp-concat and gulp-typescript, is there a package available to avoid this issue?

example on github

Answer №1

It seems that when dealing with a large number of classes, the output file ends up containing a significant amount of unnecessary code. Could I be mistaken about something?

No, you are not mistaken. This is intentional. TypeScript allows each section to function independently.

Important Note

We recommend migrating to modules for better organization. For more information, visit https://basarat.gitbooks.io/typescript/content/docs/tips/outFile.html

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