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

Checkbox within Select Option: A Solution Using HTML, CSS, JavaScript

Adding a checkbox within a select option menu directly is not feasible. However, a similar functionality can be achieved using a workaround involving HTML, CSS, and JavaScript.

Creating the Interface

The HTML and CSS create a select option menu with an additional clickable div that hides and shows a list of checkboxes. The div mimics the appearance of a select option menu and when clicked, toggles the visibility of the checkboxes.

JavaScript Logic

The JavaScript function toggles the display property of the checkbox container, ensuring it is visible or hidden based on the user's interaction with the select box div.

Sample Implementation:

<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;
  }
}

This approach provides the desired functionality of a select option menu with an integrated checkbox, offering greater flexibility in form design.

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