HTML DOM 郵箱輸入大小屬性

HTML DOM 郵箱輸入大小屬性返回/設定輸入郵箱大小屬性。如果未定義，該屬性返回“20”。

語法

以下是語法 -

返回size屬性

inputEmailObject.size

將size屬性設定為數字

inputEmailObject.size = number

示例

下面我們來看一個輸入郵箱大小屬性示例 -

線上演示

<!DOCTYPE html>
<html>
<head>
<title>Input Email size</title>
<style>
   form {
      width:70%;
      margin: 0 auto;
      text-align: center;
   }
   * {
      padding: 2px;
      margin:5px;
   }
   input[type="button"] {
      border-radius: 10px;
   }
</style>
</head>
<body>
<form>
<fieldset>
<legend>Email-size</legend>
<label for="EmailSelect">Email Id :
<input type="email" id="EmailSelect" size="10">
</label><br>
<input type="button" onclick="increaseVisibility()" value="Increase Visibility">
<div id="divDisplay"></div>
</fieldset>
</form>
<script>
   var divDisplay = document.getElementById("divDisplay");
   var inputEmail = document.getElementById("EmailSelect");
   function increaseVisibility() {
      inputEmail.size = 30;
      divDisplay.textContent = 'Visibility Increased to '+inputEmail.size;
   }
</script>
</body>
</html>