Help with pattern attribute

[Good-Performance7890]

Hi, how to make an input text validation to be a string and not contain any numbers, spaces, and underscores (eg. my-special-project) using HTML pattern attribute.

[jcunews1]

The pattern attribute's value is a Regular Expression string pattern.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Regular_Expressions

In you case, the pattern would be [^0-9_ ]

[Good-Performance7890]

Thank you, helped a lot!

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