Add TypeScript declaration

[zsevic]

I wanted to use this package in Hapi/TypeScript project so I had to add this file in node_modules/hapi-dev-errors to work properly.

[marcuspoehls]

@zsevic Thank you for the PR! I’m not familiar with Typescript yet. I need to read on the TS essentials to wrap my head around it.

Can you please describe what this one-liner does?

I’m mainly interested in the effects that are enabled with when merging this PR.

For example, does this change allow you to import hapi-dev-errors in Typescript`? Why isn’t this hapi plugin working with TS at this point? Should I add a default export?

Thank you for your help!

[zsevic]

index.d.ts is used to provide TypeScript type information about a module that's written in JavaScript. This will allow you to use the JavaScript modules without the need to convert them to TypeScript, without getting any type error on your code.

Here are examples how it looks like for Node and Hapi.

This one-liner is enough to allow importing hapi-dev-errors in TypeScript, default export isn't needed here. You're welcome!

[marcuspoehls]

@zsevic Thank you Željko for this addition. I’ve tagged version 3.3.0 containing the TypeScript declaration 👍