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<!DOCTYPE html> <html> <body> <h2>tel 电话字段</h2> <p><strong>input type="tel"</strong> 用于应包含电话号码的输入字段：</p> <form action="/action_page.php"> <label for="phone">输入电话号码：</label><br><br> <input type="tel" id="phone" name="phone" placeholder="123-45-678" pattern="[0-9]{3}-[0-9]{2}-[0-9]{3}" required><br><br> <small>格式：123-45-678</small><br><br> <input type="submit" value="提交"> </form> </body> </html>