Validate HTML Inputs w/ Pattern Attribute

Validate HTML Inputs w/ Pattern Attribute

Add a simple pattern and title attribute on any HTML input to only allow a specific value or part of a value to be accepted. This can be used to validate emails from a specific domain like “@example.com” or only accept links that include a specific string. The title attribute allows a custom message appear in a browser default tooltip if the email entered isn’t valid.

Within the pattern attribute we use regex to determine what value match is approved. You can use regex to match just about anything, so this general approach can also be used to match other specific values in any input.

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5.4.23

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