What regex matches an tag in HTML?

If you’re looking for a regular expression to match an <input> tag in HTML, here’s a basic example:

#regex
<input\b[^>]*>

Breakdown:

• <input: Matches the opening of the <input> tag.
• \b: Asserts a word boundary to ensure “input” is a whole word.
• [^>]*: Matches any characters except the closing angle bracket >, allowing for attributes.
• >: Matches the closing angle bracket of the tag.

#regex
!?(\d|\[\d-\d\])(,!?(\d|\[\d-\d\]))*

#output
1
1,2,3
!2,!3
[1-2]
[1-4],[3-5]
![1-4],![3-5]
1,2,3,[1-4],[3-5]
![1-4],![3-5],1,2,!7

Note:

• This regex will match a self-closing <input> tag (e.g., <input type="text" />).
• It does not account for multiple attributes or newline characters; for more complex scenarios, additional adjustments may be necessary.
• Be cautious using regex for HTML parsing, as it can get complex. For robust solutions, consider using an HTML parser library.

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