Guard caniuse table rendering against missing .head dl element - #5374
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brian-soltani wants to merge 3 commits into
Open
Guard caniuse table rendering against missing .head dl element#5374brian-soltani wants to merge 3 commits into
brian-soltani wants to merge 3 commits into
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run() assumed document.querySelector(".head dl") always finds an element and used optional chaining on headDlElem to avoid crashing when it doesn't. That silently no-ops instead of surfacing the problem, and it still throws later since headDlElem is read unguarded elsewhere in the function.
This adds an early return with a showWarning() call when the .head dl element isn't found, matching the existing pattern used in implementation-status.js, and removes the now-redundant optional chaining on the two remaining headDlElem accesses.
Closes speced#5370
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Pull request overview
Adds safe handling when the caniuse table’s target element is missing.
Changes:
- Emits a warning and exits early when
.head dlis unavailable. - Removes redundant optional chaining after the guard.
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| if (!headDlElem) { | ||
| const msg = `Can't render caniuse browser support table: no ".head dl" element was found.`; | ||
| showWarning(msg, name); | ||
| return; |
Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>
marcoscaceres
requested changes
Aug 21, 2026
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run() assumed document.querySelector(".head dl") always finds an element and used optional chaining on headDlElem to avoid crashing when it doesn't. That silently no-ops instead of surfacing the problem, and it still throws later since headDlElem is read unguarded elsewhere in the function.
This adds an early return with a showWarning() call when the .head dl element isn't found, matching the existing pattern used in implementation-status.js, and removes the now-redundant optional chaining on the two remaining headDlElem accesses.
Closes #5370