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lint-mdx.js: multi-line opening tags (Card, CardGroup, etc.) silently skipped by attribute check

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Assessment

Difficulty
3/5
Estimated time
1-2 days
Newbie friendliness
45/100
Issue type
Bug
Clarity
Clearly specified
Activity status
Quiet
Tech stack
javascript

Research direction

Start in scripts/lint-mdx.js at checkMintlifyComponents and inspect how each line is matched against the opening-tag regex. Run the linter against the cited MDX files, then verify that multi-line Card tags are checked, including a synthetic Card missing title=, while existing valid tags produce no new findings.

Written by the indexing model from the issue text.

Description

Description

The opening-tag check in scripts/lint-mdx.js (checkMintlifyComponents) matches each line against a regex that expects the tag and its attributes on the same line. When a tag's name is on its own line, with attributes like title= spread across the following lines, the regex never matches - so the tag is silently skipped entirely. No required-attribute check runs, no CardGroup cols check runs, and it is not tracked for parent/child nesting rules.

Evidence

Found 5 multi-line opening tags across 2 files that were never being checked at all:

  • docs/base-account/quickstart/ai-tools-available-for-devs.mdx - 3 multi-line Card tags (lines 10, 47, 67)
  • docs/apps/resources/templates.mdx - 2 multi-line Card tags (lines 22, 28)

All 5 happen to already have a valid title= attribute, so this gap doesn't currently produce any wrong output in the lint report - but it means the linter would silently miss a genuinely missing title on any of these tags, or on any future multi-line tag written in this style.

Example (ai-tools-available-for-devs.mdx):
A Card tag opens on its own line, with title= and other attributes set on the following lines, closing several lines later. Because the check only reads the line containing <Card, it never sees the tag at all.

Fix

Companion PR makes the check accumulate lines starting at a lone opening-tag line until a closing > is found, then runs the existing regex against the accumulated text. Verified against all 5 real instances (no new findings, since they're all valid) and a synthetic multi-line Card missing title=, which is now correctly flagged.

Dominant language
JavaScript
Stars
337
Forks
798
Avg merge
13h 7m
Merged PRs (30d)
57

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