HTML 输入值属性

HTML input value 属性用于设置/返回值属性的值。

让我们看一个 输入值 属性的示例 −

示例

<!DOCTYPE html>
<html>
<head>
<title>Input URL value</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>URL-value</legend>
<label for="URLSelect">URL Id:
<input type="url" id="URLSelect">
<input type="button" onclick="getUserURL('google')" value="Google">
<input type="button" onclick="getUserURL('bing')" value="Bing"><br>
<input type="button" onclick="redirection()" value="Go">
</label>
<div id="divDisplay"></div>
</fieldset>
</form>
<script>
   var divDisplay = document.getElementById("divDisplay");
   var inputURL = document.getElementById("URLSelect");
   function getUserURL(userName) {
      if(userName === 'google')
         inputURL.value = 'https://www.google.com';
      else
         inputURL.value = 'https://www.bing.com';
   }
   function redirection() {
      if(inputURL.value !== '')
         divDisplay.textContent = 'Redirecting to '+inputURL.value;
      else
         divDisplay.textContent = 'Enter URL';
   }
</script>
</body>
</html>