Web Reference: Note: The pattern attribute works with the following input types: text, date, search, url, tel, email, and password. Tip: Use the global title attribute to describe the pattern to help the user. Tip: Learn more about regular expressions in our JavaScript tutorial. Jan 25, 2026 · You can use the pattern attribute to specify a regular expression that the inputted value must match in order to be considered valid (see Validating against a regular expression for a crash course on using regular expressions to validate inputs). Sep 12, 2025 · Today, fortunately, the story is very different: thanks to the pattern attribute, we can validate forms directly from HTML using regular expressions, without external libraries and without headaches.
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