How to find the selected value of a dropdown in JavaScript?

To find the selected value of a dropdown in JavaScript, do this: const value = dropdown.value.

For example, if this is your dropdown:

<select id="dropdown">
  <option value="1">A</option>
  <option value="2">B</option>
  <option value="3">C</option>
</select>

Then you can get its value with this JavaScript:

const value = document.getElementById('dropdown').value;