How to Simulate a Checkbox within a Select Option Menu Using HTML, CSS, and JavaScript?

Adding a Checkbox to a Select Option Menu

Utilizing the standard HTML elements available, it is not possible to incorporate a checkbox within a select option menu. However, with the aid of HTML, CSS, and JavaScript, you can create a solution that mimics similar functionality.

Implementing a Checkbox-like Select Option

To achieve the desired functionality, follow these steps:

1. Define the HTML structure, including a select option and a set of hidden checkboxes.
2. Create the CSS styles to position and hide the checkboxes.
3. Use JavaScript to toggle the visibility of the checkboxes when the select option is clicked.

The provided code snippet demonstrates how to construct such a component:

<form>
  <div class="multiselect">
    <div class="selectBox" onclick="showCheckboxes()">
      <select>
        <option>Select an option</option>
      </select>
      <div class="overSelect"></div>
    </div>
    <div>

.multiselect {
  width: 200px;
}

.selectBox {
  position: relative;
}

.selectBox select {
  width: 100%;
  font-weight: bold;
}

.overSelect {
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
}

#checkboxes {
  display: none;
  border: 1px #dadada solid;
}

#checkboxes label {
  display: block;
}

#checkboxes label:hover {
  background-color: #1e90ff;
}

var expanded = false;

function showCheckboxes() {
  var checkboxes = document.getElementById("checkboxes");
  if (!expanded) {
    checkboxes.style.display = "block";
    expanded = true;
  } else {
    checkboxes.style.display = "none";
    expanded = false;
  }
}

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