when %j exists in a formatted object, it pulls in the timestamp/delta
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Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 35/100
- Issue type
- Bug
- Clarity
- Mostly clear
- Activity status
- Stale
- Tech stack
- javascript
- Domain
- observability
Research direction
Start with the formatter path exercised by demo('%o', data) and reproduce the example using data containing '%j'. Trace how recursive formatting handles the timestamp or delta arguments, then verify the corrected output against the reported expectation that the timestamp/delta is not consumed or misplaced.
Written by the indexing model from the issue text.
Description
I found this when debugging some mysql search strings, so for example looking for a name like "jordan" to appear somewhere in a string, but wrapped with % to match anywhere in the string: %jordan%...
repro:
const demo = require('debug')('demo');
const data = [ '%j' ];
demo('%o', data);
Prints:
demo "\u001b[38;5;166m+30m\u001b[0m"
Note that the timestamp/delta is not appended to the end of the output as usual.
I know that %j is for pulling in json, but this is in the data object I'm running through the formatter. Is recursive formatting supposed to be happening? And even if it is, why would it pull in the timestamp/delta as if that were one of the arguments I was passing into the debug function?
- Dominant language
- JavaScript
- Stars
- 11.5k
- Forks
- 992
- PR merge metrics
- No merged PRs in 30d
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