HTML DOM 输入数字输入框 min 属性
DOM input number min 属性返回并修改 type=”number” HTML 文档中输入字段的 min 属性值。
语法
语法如下 −
返回 min
object.min
2. 修改 min
object.min = “number”
示例
让我们来看一看 HTML DOM input number min 属性的示例 −
<!DOCTYPE html> <html> <head> <style> html{ height:100%; } body{ text-align:center; color:#fff; background: linear-gradient(62deg, #FBAB7E 0%, #F7CE68 100%) center/cover no-repeat; height:100%; } p{ font-weight:700; font-size:1.1rem; } input{ display:block; width:35%; border:2px solid #fff; background-color:transparent; color:#fff; font-weight:bold; padding:8px; margin:1rem auto; } .btn{ background:#0197F6; border:none; height:2rem; border-radius:2px; width:35%; margin:2rem auto; display:block; color:#fff; outline:none; cursor:pointer; } .show{ font-size:1.5rem; font-weight:bold; } </style> </head> <body> <h1>DOM Input number max/min property Demo</h1> <p>Enter your roll number (between 1 and 60)</p> <input type="number" class="numberInput" min="1" max="60"> <button type="button" onclick="showMySelection()" class="btn">Show Roll Number</button> <div class="show"></div> <script> function showMySelection() { var numberInput = document.querySelector(".numberInput"); var showMsg = document.querySelector(".show"); console.log(numberInput.min,numberInput.max); if(numberInput.value === ''){ showMsg.innerHTML="Please enter value!!"; }else{ if((numberInput.value <= 1) && (numberInput.value <= 60)){ showMsg.innerHTML = numberInput.value; }else{ showMsg.innerHTML = "Please enter correct roll number!!"; } } } </script> </body> </html>
输出
将生成以下输出 −
输入介于 1 到 60 之间的任何学号,然后单击“显示学号”按钮以显示学号。
输入超出范围的学号,然后单击“显示学号”按钮以显示警告消息。
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