W3School TIY
编辑您的代码：
<!DOCTYPE html> <html> <body> <p> Depending on browser support:<br> Fixed steps will apply in the input field. </p> <form action="http://w3c.80zhan.com/tiy/action_page.php"> Quantity: <input type="number" name="points" min="0" max="100" step="10" value="30"> <input type="submit"> </form> <p><b>Note:</b>type="number" is not supported in IE9 and earlier. </p> </body> </html>
查看结果: