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fix: handle malformed JSX tags with quotes in invalid positions #50

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fix: handle malformed JSX tags with quotes in invalid positions #50

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16 changes: 16 additions & 0 deletions src/plugins/sanitize.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -83,6 +83,22 @@ export function preprocessMdxTags() {
// Remove leading whitespace from code fence blocks
let processed = code.replace(/^(\s+)(```\w*)/gm, '$2');

// Handle malformed tags with single quotes appearing where attribute names should be
// Very specific pattern: <TagName space then single quote not followed by = (malformed attribute)
processed = processed.replace(/<([a-z][a-z0-9]*)\s+[^>=\s]*?['"][^>=]*?>/gi, (match, _tag, offset) => {
// If inside a code block, do not touch
if (isInsideCodeBlock(processed, offset)) {
return match;
}
// Check if this looks like a malformed attribute (quote not preceded by =)
const beforeQuote = match.match(/<[a-z][a-z0-9]*\s+([^>=]*?)['"][^>=]*?>/i);
if (beforeQuote && beforeQuote[1] && !beforeQuote[1].endsWith('=')) {
// This is malformed - quote appears where it shouldn't
return `\`${match}\``;
}
return match;
});

// Only replace unrecognized <someTag> with `"<someTag>"` if NOT inside a code block
// This regex finds all <tag> occurrences
processed = processed.replace(/<([a-z][a-z0-9]*)>/gi, (match, tag, offset) => {
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