What is the best practice for inserting typescript definitions and writing them when the object already has a pre-existing definition?

Apologies for this question, as I am struggling to find the necessary information due to my limited understanding of Typescript. I have integrated a jquery plugin called typeahead and added a global variable named bound on the window object for communication with my C# wrapper app.

Unfortunately, these additions are causing errors during compilation, and I need guidance on how to address them. I considered creating definitions for these items, but I cannot locate relevant documentation. Although I installed a definition for jquery using typings, it seems that the window object already has its own definition.

The specific errors I encounter are:

Property 'typeahead' does not exist on type 'JQuery'.
Property 'bound' does not exist on type 'Window'.

How can I resolve these errors? If defining new types is necessary, where should these definitions be placed, especially for objects that already have existing definitions?

I attempted to create an index.d.ts file in the project root, but encountered the following error even without any content in the file:

WARNING in ./src/index.d.ts
Module build failed: Error: Debug Failure. False expression: Output generation failed

Despite trying different approaches like interface statements, module declaration statements, and namespace declaration statements, the error persists. Is there a specific filename or location requirement for these definitions?

I reviewed the documentation at https://www.typescriptlang.org/docs/handbook/writing-declaration-files.html but could not find instructions on where to place definitions or how to handle objects with pre-existing definitions.

Your assistance is greatly appreciated. Thank you in advance for any advice provided.

EDIT

Neither Definitely Typed nor Typings offer definitions for the typeahead library I am using or the global bound object I created. I am seeking clarification on manually resolving these errors.

Answer №1

If you are looking to access typeahead definitions, you can find them on DefinitelyTyped. In order to incorporate these definitions into your files, simply include the following line of code:

/// <reference path="./pathFromFile/typeahead.d.ts" />

To craft or expand upon definitions for a JavaScript library, you will need to generate a .d.ts file. This file can be placed anywhere as long as the reference path is accurate. I found this guide particularly helpful in this process.

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