If you create a menu or navigation that contains too many navigational links, it will make it difficult for users to read and not display well on small device screens. Therefore, dropdown was born to solve the above problem. Its main task is to create a clear coherent structure to help users have a better overview as well as to group sublinks into one main section to reduce the usable area of the website.
Html Drop Down List
Jquery Dropdown Menu

You can see the results below.
See the Pen Smooth Accordion Dropdown Menu by fainder (@fainder) on CodePen.
Dropdown menu HTML

You can see the results below.
See the Pen Simple CSS only dropdown menu by Mads Håkansson (@madshaakansson) on CodePen.
Onclick Dropdown Menu Example

You can see the results below.
See the Pen Drop-Down Menu by Scott Marshall (@ScottMarshall) on CodePen.
HTML dropdown list

You can see the results below.
See the Pen Dropdown menu interaction by Aaron Iker (@aaroniker) on CodePen.
Dropdown Menu CSS

You can see the results below.
See the Pen CSS Animated Dropdown Menu by Amber Weinberg (@amberweinberg) on CodePen.
Drop Down List In HTML CSS

You can see the results below.
See the Pen Dropdown Menu Animation by Dany Santos (@THEORLAN2) on CodePen.
HTML Input Drop Down List

You can see the results below.
See the Pen Dropdown Menu jQuery by naymapl (@Naymapl) on CodePen.
Input Select Background Color
You can see the results below.
See the Pen Dropdown dark/light - pure css - #14 by Ivan Grozdic (@ig_design) on CodePen.
HTML Create Drop Down Menu

You can see the results below.
See the Pen Gooey Dropdown Menu by Mark Eriksson (@Markshall) on CodePen.
HTML Drop Down List Code

You can see the results below.
See the Pen Only CSS3 Dropdown Menu by Pedro Nauck (@pedronauck) on CodePen.
Responsive Drop Down Menu Example

You can see the results below.
See the Pen 3d nested navigation by Devilish Alchemist (@devilishalchemist) on CodePen.
Dropdown button in HTML

You can see the results below.
See the Pen Interactive Dropdown Menu by Josh Boothman (@josh_boothman) on CodePen.
Vertical Menu CSS With Submenus

You can see the results below.
See the Pen Vertical Dropdown Menu by Bülent Sakarya (@bulentsakarya) on CodePen.
Basic Html Drop Down Menu

You can see the results below.
See the Pen Simple PureCss dropdown menu with following subnav by Robert Borghesi (@dghez) on CodePen.
Dropdown Navigation Menu Html

You can see the results below.
See the Pen Pure Css dropdown menu by Sathish kumar (@sathishlxg) on CodePen.
Overlay Dropdown Menu Css

You can see the results below.
See the Pen Shopping Cart Dropdown by Andre Madarang (@drehimself) on CodePen.
Simple CSS Dropdown Menu Responsive

You can see the results below.
See the Pen Navbar by Mustafa Omar (@themustafaomar) on CodePen.
HTML Drop Down Box Code

You can see the results below.
See the Pen Pretty Select dropdown by j0be (@j0be) on CodePen.
HTML Dropdown Input

You can see the results below.
See the Pen CSS styled and filterable select dropdown by Mari Johannessen (@marijoha) on CodePen.
HTML Drop Down List With Links

You can see the results below.
See the Pen Zigzag dropdown menu concept by Catalin Rosu (@catalinred) on CodePen.
CSS3 Menu Dropdown Collection Animation

You can see the results below.
See the Pen CSS3 Menu Dropdowns by Colin (@cmcg) on CodePen.
Multiple select dropdown with checkbox in HTML

You can see the results below.
See the Pen 💥 EXPERIMENTAL: Pure CSS dropdowns with single and multiple select by Explosion AI (@explosion) on CodePen.
Simple Html Dropdown Button HTML

You can see the results below.
See the Pen Simple Dropdown by Dianatomic (@Dianatomic) on CodePen.
Responsive multi level dropdown menu CSS only

You can see the results below.
See the Pen CSS-Only Nested Dropdown Navigation by Gabrielle Wee 🧧 (@gabriellewee) on CodePen.
CSS style select option dropdown

You can see the results below.
See the Pen Pure CSS Dropdown by Rafael González (@rgg) on CodePen.
Javascript Dropdown Select

You can see the results below.
See the Pen Solution for Long Drop Down Items by Larry Geams Parangan (@larrygeams) on CodePen.
Html5 Dropdown Menu

You can see the results below.
See the Pen Swanky Pure CSS Drop Down Menu V2.0 by Jamie Coulter (@jcoulterdesign) on CodePen.
Dropdown Form Bootstrap

You can see the results below.
See the Pen Custom select menu by Husam Alrubaye (@husamui) on CodePen.
Drop Down List HTML CSS

You can see the results below.
See the Pen Drop Down Menu CSS3 Awesome by Virlyz ID (@samsurysites) on CodePen.
Drop Down Menu Javascript Code

You can see the results below.
See the Pen Daily Ui #07 - Dropdowns by LeFourbeFromage (@lefourbefromage) on CodePen.
Dropdown Select CSS Style

You can see the results below.
See the Pen Select dropdown (Light & Dark) by Aaron Iker (@aaroniker) on CodePen.
HTML Input Type Drop Down List

You can see the results below.
See the Pen Drop-down List Effect by Vijaya Kumar Vulchi (@vulchivijay) on CodePen.
Javascript Dropdown Selected Value

You can see the results below.
See the Pen Morphing tab button with list by Colin Horn (@colinhorn) on CodePen.
Javascript Dropdown Menu Animation

You can see the results below.
See the Pen Dropp by Paulo Nunes (@syndicatefx) on CodePen.
Animated Dropdown-menu Bootstrap 4

You can see the results below.
See the Pen CSS3 Card Deck Drop Down by Brady Sammons (@soulrider911) on CodePen.
Css Menu Dropdown Ul Li

You can see the results below.
See the Pen Dropdown buttons by Paul (@peiche) on CodePen.
HTML Dropdown With Search

You can see the results below.
See the Pen pure css jquery dropdown with search by Saravanan (@saravanajd) on CodePen.
html5 dropdown menu example

You can see the results below.
See the Pen Dropdown Inspired from DigitalOcean by Asyraf Hussin (@AsyrafHussin) on CodePen.
Vue-multiselect Dropdown With Checkbox

You can see the results below.
See the Pen Vue.js - Multi-select custom searchable dropdown with custom checkboxes by Dejan Babić (@microfront) on CodePen.
React Dropdown Menu Example

You can see the results below.
See the Pen React Dropdown Menu by Mikkel Laursen (@mlaursen03) on CodePen.
React Dropdown Example

You can see the results below.
See the Pen React Dropdown Slide by RazorX (@RazorXio) on CodePen.
React Dropdown

You can see the results below.
See the Pen React Dropdown - No Window Listener by Maxime Preaux (@deammer) on CodePen.
Dropdown In React Js Example

You can see the results below.
See the Pen React Dropdown Menu by Taylor Harwood (@taylorharwood) on CodePen.
Vue Dropdown

You can see the results below.
See the Pen Vue Dropdown by Jorge Nieto (@jnieto) on CodePen.
Vuejs Tailwind Animated Dropdown

You can see the results below.
See the Pen Vuejs + Tailwind animated dropdown by Djordje (@dzoni404) on CodePen.
Related Articles:
Summary
I hope the article will provide html dropdown menu for web development and if you have any questions, just send an email and I will respond as soon as possible. I hope you continue to support the site so that I can write more good articles. Have a nice day!