JSONC¶

Spec: Deno jsonc: JSON + comments + trailing commas Engine: jsonc-parser 0.33 Backend: NativeJsoncCodec

Capabilities¶

Feature	Supported	Behaviour
`null` values	yes	first-class `None`
`.inf` / `.nan` floats	—	outside this format's contract
integers beyond 64-bit	yes	exact round-trip
comments	yes	accepted on load
trailing array commas	yes	accepted
anchors & aliases (`&x` / `*x`)	—	outside this format's contract
merge keys (`<<`)	—	outside this format's contract
leading UTF-8 BOM	—	outside this format's contract
repeated `[section]` blocks	—	outside this format's contract
`iloads`/`idumps` record streaming	yes	one record at a time, never the whole document

import eserde
from eserde import Format

eserde.loads(b'{"k": 1} // why', format=Format.JSONC)
# {'k': 1}   — the comment is metadata, not data

// and /* */ comments and trailing commas are accepted on load, dropped on dump — comments are not data.
A leading BOM is rejected, like plain JSON.
Non-finite floats serialize to null, like JSON.