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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>HTML5 Validation + jQuery read</title> <script src="https://code.jquery.com/jquery-3.6.0.min.js"></script> <style> input:invalid{border:1px solid #f44336;} input:valid{border:1px solid #4caf50;} </style> </head> <body> <form id="f"> <input id="mail" name="mail" type="email" required placeholder="Email (required)"> <input id="age" name="age" type="number" min="18" max="60" placeholder="Age 18-60"> <button type="submit">Submit</button> </form> <pre id="out"></pre> <script> $("#f").on("submit", function(e){ if(!this.checkValidity()){ e.preventDefault(); $("#out").text("Browser blocked submit: invalid fields."); } }); </script> </body> </html>
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