Support import of jsonc file to infer type

[gkhub]

Suggestion

🔍 Search Terms

typescript jsonc

json jsonc

✅ Viability Checklist

My suggestion meets these guidelines:

• [x] This wouldn't be a breaking change in existing TypeScript/JavaScript code
• [x] This wouldn't change the runtime behavior of existing JavaScript code
• [x] This could be implemented without emitting different JS based on the types of the expressions
• [x] This isn't a runtime feature (e.g. library functionality, non-ECMAScript syntax with JavaScript output, new syntax sugar for JS, etc.)
• [x] This feature would agree with the rest of TypeScript's Design Goals.

⭐ Suggestion

Enable supporting import of jsonc file to provide typing information.

import * as data from './test.jsonc';

type myType = typeof data;

The import statement for jsonc is not supported today.

📃 Motivating Example

import * as data from './test.jsonc';

type myType = typeof data;

💻 Use Cases

Our scenario auto generates UX based on declarative jsonc file. We have a requirement to load and infer the type specified in the jsonc file to invoke some component in the UX. There is no typing support currently and workaround is to manually construct the data.

[gerardo-lima-moonfare]

Unfortunately -- and ironically -- import { compilerOptions } from 'tsconfig.json'; doesn't usually work. It would be great to be able to import jsonc files as easily as importing regular json files.

[zsolt-dev]

Importing json files with comments should be supported. Comments are much needed in the configuration files which are mostly json. I know that the json spec prohibits comments, but everyone is eventually pushed to support comments, which would mean that the spec should change too. Even tsconfig.json supports comments, but like @gerardo-lima-moonfare mentioned, you cannot import it :)

[jwueller]

I might be wrong here, but I seem to remember that the JSON spec allows a parser to accept comments, but not to emit them when serializing. So it would likely be compliant to just allow importing them directly too.

[pavinduLakshan]

Is there any update on this 👀 ?

[marek-vodvarka]

+1 for this, would be really useful