使用正则将Markdown转HTML时，如何移除残留的粗体双星号？

Key Issue #

Your existing regex uses lookaheads/lookbehinds which only check for the presence of ** but don't include them in the match to replace. That's why the delimiters stay in the output.

Corrected Code #

Use a regex that explicitly matches the ** delimiters and captures the content between them:

const text = 'My **bold\n\n** text.\n';
const boldRegex = /\*\*(.*?)\*\*/gs;
const html = text.replace(boldRegex, '<strong>$1</strong>');
console.log(html);

Breakdown of the Regex #

• \*\*: Matches both the opening and closing bold markers
• (.*?): Non-greedy capture group to get all content between the markers (works across newlines thanks to the s flag)
• gs flags:
  • g: Ensures all occurrences are replaced, not just the first
  • s: Makes the . character match newline characters, so multi-line bold content is handled correctly

Result #

The output will now be: My <strong>bold\n\n</strong> text. with no residual ** delimiters.

内容的提问来源于stack exchange，提问作者Anton Olshanetsky