Intent to prototype: JSON.parse with source

[Bryan Thrall]

Summary:

`JSON.parse with source`is a TC39 proposal [1] at Stage 3 of the TC39 standardization process.

It extends JSON.parse behavior to grant reviver functions access to the input source text and extending JSON.stringify behavior to support object placeholders for raw JSON text primitives.

Bug:

https://bugzilla.mozilla.org/show_bug.cgi?id=1855468

Platform Coverage:

All

Specification:

https://tc39.es/proposal-json-parse-with-source

Standards Body:

TC39

Preference:

Will be available in the JS shell using the option `--enable-json-parse-with-source` when Bug 1860887 lands. Will be preffable under `javascript.options.experimental.enable_json_parse_with_source` when Bug 1865406 lands.

Other browsers:

Chrome Status: In developer trial

https://chromestatus.com/feature/5121582673428480

Safari Status: In development

https://bugs.webkit.org/show_bug.cgi?id=248031

[1]: https://github.com/tc39/proposal-array-from-async

[2]: https://tc39.es/process-document/

-- 
Bryan Thrall
Senior Software Engineer
Mozilla