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Support proposal-json-parse-with-source (JSON.rawJSON(), JSON.isRawJSON(), context parameter of reviver function, etc...) #61330
Description
⚙ Compilation target
ESNext
⚙ Library
ESNext
Missing / Incorrect Definition
JSON.rawJSON() appears to be missing. Apologies if I've missed something or if this is the wrong place to raise an issue. I searched through both PRs and issues in both this repo and https://github.com/microsoft/TypeScript-DOM-lib-generator but couldn't find any references for it.
Sample Code
// https://www.typescriptlang.org/play/?target=99#code/MYewdgzgLgBAHjAvDAUgZQPIDkB0AnAQwHd1sAKAcgAYKBKIA
const x = JSON.rawJSON('0')Documentation Link
Per #19044 it seems like TypeScript's policy is to support Stage 3+ features and proposal-json-parse-with-source is stage 3. (If I misunderstood the typescript teams policy on experimental features it would be awesome to have this documented in https://github.com/Microsoft/TypeScript/wiki/FAQ)
MDN also documents this feature here.
Additionally, it appears to have been implemented in V8 and in webkit.
Testing experimentally, it is available in node 22+ and in the latest Chromium as well:
Activity
RobMayer commentedon Mar 10, 2025
the third parameter of the JSON.parse reviver is also missing, it seems - same proposal.
ym-project commentedon Mar 24, 2025
Also there is
JSON.isRawJSON(value)[-]Support for `JSON.rawJSON()`[/-][+]Support `proposal-json-parse-with-source` (`JSON.rawJSON()`, `JSON.isRawJSON()`, `context` parameter of `reviver` function, etc...)[/+]ahmouse15 commentedon Feb 15, 2026
Any updates on this? This feature has been standard in browsers and node for almost 3 years now.
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context
Add lib types for JSON.rawJSON, JSON.isRawJSON, and reviver context