Is it possible to author TypeScript modules in a format other than ES6?

Is it possible to utilize AMD for writing code?

define([
  'hb!./some/file.hb'
], function(template) {
  //
})

Answer №1

Indeed, to a certain degree.

Given that TypeScript is essentially an extension of JavaScript, any valid JavaScript code will also be considered valid TypeScript.

In the scenario provided, an error message regarding define would be displayed by the compiler:

Error TS2304: Cannot find name 'define'.

Prior to utilizing it, you must inform the compiler about the existence of define:

declare var define;

define([
  'hb!./some/file.hb'
], function(template) {
  //
})

This action indicates to the compiler that define is present, although no extra information pertaining to it is supplied. In order to supply additional context, considering adding the appropriate type definition.

When working with amd modules, integrating an amd module loader remains necessary. This isn't inherently supported within TypeScript itself, as TypeScript functions as an advanced version of JavaScript.

Employing TypeScript allows for type checking during compilation and enables utilization of newer JavaScript capabilities while transpiling to older JavaScript versions. However, understanding the contents exported by other modules may prove challenging for TypeScript; thus, declarations detailing each AMD module's exports are indispensable.

As elucidated in another response, crafting modules using ES6 syntax and compiling them into the amd format is a viable alternative. The official documentation at TypeScriptLang.org expounds on this process:

Based on the specified module target during compilation, the compiler generates suitable code for Node.js (CommonJS), require.js (AMD), isomorphic (UMD), SystemJS, or ECMAScript 2015 native modules (ES6) module-loading systems. Consult each module loader's documentation to better comprehend the functionality of the define, require, and register calls embedded in the generated code.

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