JSON Trailing Comma: Find the Line, or Switch to JSONC
One comma before } or ] breaks the parse. Compare the Node.js and Python messages, find the line in a browser-only formatter, and check which of JSONC and JSON5 still accept it.
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One comma before } or ] breaks the parse. Compare the Node.js and Python messages, find the line in a browser-only formatter, and check which of JSONC and JSON5 still accept it.
Diagnose JSON parse errors caused by trailing commas, quotes, comments, empty responses, BOMs, or HTML returned instead of JSON. Compare current and older error wording, then inspect the input in-browser.