HTML

Tailwind CSS dropdown

<button id="dropdownButton" data-dropdown-toggle="dropdown" class="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:ring-blue-300 font-medium rounded-lg text-sm px-4 py-2.5 text-center inline-flex items-center dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800" type="button">Dropdown button <svg class="ml-2 w-4 h-4" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path></svg></button>

<!-- Dropdown menu -->
<div id="dropdown" class="hidden z-10 w-44 text-base list-none bg-white rounded divide-y divide-gray-100 shadow dark:bg-gray-700">
    <ul class="py-1" aria-labelledby="dropdownButton">
      <li>
        <a href="#" class="block py-2 px-4 text-sm text-gray-700 hover:bg-gray-100 dark:hover:bg-gray-600 dark:text-gray-200 dark:hover:text-white">Dashboard</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 text-sm text-gray-700 hover:bg-gray-100 dark:hover:bg-gray-600 dark:text-gray-200 dark:hover:text-white">Settings</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 text-sm text-gray-700 hover:bg-gray-100 dark:hover:bg-gray-600 dark:text-gray-200 dark:hover:text-white">Earnings</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 text-sm text-gray-700 hover:bg-gray-100 dark:hover:bg-gray-600 dark:text-gray-200 dark:hover:text-white">Sign out</a>
      </li>
    </ul>
</div>

How to use dropdown with tailwind

<button id="dropdownInformationButton" data-dropdown-toggle="dropdownInformation" class="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:outline-none focus:ring-blue-300 font-medium rounded-lg text-sm px-4 py-2.5 text-center inline-flex items-center dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800" type="button">Dropdown header <svg class="w-4 h-4 ml-2" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path></svg></button>

<!-- Dropdown menu -->
<div id="dropdownInformation" class="z-10 hidden bg-white divide-y divide-gray-100 rounded shadow w-44 dark:bg-gray-700 dark:divide-gray-600">
    <div class="px-4 py-3 text-sm text-gray-900 dark:text-white">
      <div>Bonnie Green</div>
      <div class="font-medium truncate">name@flowbite.com</div>
    </div>
    <ul class="py-1 text-sm text-gray-700 dark:text-gray-200" aria-labelledby="dropdownInformationButton">
      <li>
        <a href="#" class="block px-4 py-2 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Dashboard</a>
      </li>
      <li>
        <a href="#" class="block px-4 py-2 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Settings</a>
      </li>
      <li>
        <a href="#" class="block px-4 py-2 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Earnings</a>
      </li>
    </ul>
    <div class="py-1">
      <a href="#" class="block px-4 py-2 text-sm text-gray-700 hover:bg-gray-100 dark:hover:bg-gray-600 dark:text-gray-200 dark:hover:text-white">Sign out</a>
    </div>
</div>

tailwind css ui dropdown

<!-- This example requires Tailwind CSS v2.0+ -->
<div class="relative inline-block text-left">
  <div>
    <button type="button" class="inline-flex justify-center w-full rounded-md border border-gray-300 shadow-sm px-4 py-2 bg-white text-sm font-medium text-gray-700 hover:bg-gray-50 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-offset-gray-100 focus:ring-indigo-500" id="menu-button" aria-expanded="true" aria-haspopup="true">
      Options
      <!-- Heroicon name: solid/chevron-down -->
      <svg class="-mr-1 ml-2 h-5 w-5" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20" fill="currentColor" aria-hidden="true">
        <path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd" />
      </svg>
    </button>
  </div>

  <!--
    Dropdown menu, show/hide based on menu state.

    Entering: "transition ease-out duration-100"
      From: "transform opacity-0 scale-95"
      To: "transform opacity-100 scale-100"
    Leaving: "transition ease-in duration-75"
      From: "transform opacity-100 scale-100"
      To: "transform opacity-0 scale-95"
  -->
  <div class="origin-top-right absolute right-0 mt-2 w-56 rounded-md shadow-lg bg-white ring-1 ring-black ring-opacity-5 divide-y divide-gray-100 focus:outline-none" role="menu" aria-orientation="vertical" aria-labelledby="menu-button" tabindex="-1">
    <div class="py-1" role="none">
      <!-- Active: "bg-gray-100 text-gray-900", Not Active: "text-gray-700" -->
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-0">Edit</a>
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-1">Duplicate</a>
    </div>
    <div class="py-1" role="none">
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-2">Archive</a>
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-3">Move</a>
    </div>
    <div class="py-1" role="none">
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-4">Share</a>
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-5">Add to favorites</a>
    </div>
    <div class="py-1" role="none">
      <a href="#" class="text-gray-700 block px-4 py-2 text-sm" role="menuitem" tabindex="-1" id="menu-item-6">Delete</a>
    </div>
  </div>
</div>

tailwind css dropdown

<button id="dropdownDefault" data-dropdown-toggle="dropdown" class="text-white bg-blue-700 hover:bg-blue-800 focus:ring-4 focus:outline-none focus:ring-blue-300 font-medium rounded-lg text-sm px-4 py-2.5 text-center inline-flex items-center dark:bg-blue-600 dark:hover:bg-blue-700 dark:focus:ring-blue-800" type="button">Dropdown button <svg class="ml-2 w-4 h-4" aria-hidden="true" fill="none" stroke="currentColor" viewBox="0 0 24 24" xmlns="http://www.w3.org/2000/svg"><path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M19 9l-7 7-7-7"></path></svg></button>
<!-- Dropdown menu -->
<div id="dropdown" class="hidden z-10 w-44 bg-white rounded divide-y divide-gray-100 shadow dark:bg-gray-700">
    <ul class="py-1 text-sm text-gray-700 dark:text-gray-200" aria-labelledby="dropdownDefault">
      <li>
        <a href="#" class="block py-2 px-4 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Dashboard</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Settings</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Earnings</a>
      </li>
      <li>
        <a href="#" class="block py-2 px-4 hover:bg-gray-100 dark:hover:bg-gray-600 dark:hover:text-white">Sign out</a>
      </li>
    </ul>
</div>