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HTML5
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Restrict Patterns Of Characters
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<!DOCTYPE html> <html> <head> <title>Demo</title> </head> <body> <p>Restricting a pattern of characters in text box in html5</p> <form> <input required pattern="[A-Za-z]{3}" title="3 alphabets characters only" /> <input type="submit" value="Submit" /> </form> </body> </html>
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