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<form id="myform" onsubmit="return false"> <p>아무것도 입력하지 않거나 올바르지 않은 이메일 주소를 입력하고 전송 버튼을 누르세요.<br/>(<i>Enter nothing or an incorrect email address and hit the send button.</i>)</p> <button type="submit">Submit</button> </form> <p> <input type="email" form="myform" placeholder="Enter email" required /> </p>
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