fix: css syntax error: 'Unclosed string' #1735
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KuznetsovRoman
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KuznetsovRoman
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Sep 8, 2025
packages/rrweb-snapshot/src/utils.ts
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| if (quickTestRegExp.test(cssStringified)) { | ||
| // Remove e.g. "border-top-style: ;" | ||
| const regex = /(?<=^|\{|\;)\s*[_a-zA-Z][_a-zA-Z0-9-]*:\s*;/gm; |
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regex breakdown:
- We should see "new line" or "{" or ";" before regex starts (which is precedes css rule name)
(?<=^|\{|\;) - Regex might start with empty symbols (between "new line / { / ;" and actual css rule name)
\s* - Then it matches css rule name
[_a-zA-Z][_a-zA-Z0-9-]* - After css rule name, there should be ":" symbol (between css rule name and its value)
: - Then it might have some empty symbols
\s* - Then its essential to end css rule, without any characters, which might be interpreted as css value
;
All occurrences of that regex are invalid css properties and have to be removed
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| const quickTestRegExp = /:\s*;/; | ||
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| if (quickTestRegExp.test(cssStringified)) { |
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The bug is rare, so it worth to check "if original css rules even has pattern of :\s*;"
If it hasn't, then we don't need to execute regex.
This will save some CPU cycles
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Fixes #1734