jquery dropdown menu code example

Example 1: jquery dropdown select

$('select>option:eq(3)').prop('selected', true);

Example 2: html create drop down list

<html>
 <head>
   <title>Selection Inputs</title>
 </head>
 <body>
   <form>
     <label for="selector"> <!-- Can add label if want -->
       <p>A "select" element allows users to input from a selection:</p>
       <select id="selector"> <!-- Use "select" to create object -->
         <option>Option 1</option> <!-- Add all applicable options -->
         <option>Option 2</option>
         <option selected>Option 3</option> <!-- add selected to change default from first option -->
         <optgroup label="Group"> <!-- To create nested options for categories use "optgroup" -->
           <option>Option 4</option>
           <option>Option 5</option>
       </select>
     </label>
   </form>
 </body>
</html>

Example 3: dropdown menu jquery

<!DOCTYPE html>
<html>
<head>
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
  <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
  <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
</head>
<body>

<div class="container">
  <h2>Dropdown Example</h2>
  <p>The data-toggle="dropdown" attribute is used to open the dropdown menu.</p>
  <div class="dropdown">
    <button class="btn btn-primary dropdown-toggle" id="menu1" type="button" data-toggle="dropdown">Dropdown Example
    <span class="caret"></span></button>
    <ul class="dropdown-menu" role="menu" aria-labelledby="menu1">
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">HTML</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">CSS</a></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">JavaScript</a></li>
      <li role="presentation" class="divider"></li>
      <li role="presentation"><a role="menuitem" tabindex="-1" href="#">About Us</a></li>    
    </ul>
  </div>
</div>

</body>
</html>

Example 4: jquery dropdown select

$("#element-id").val('the value of the option');

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