Gain insights into building real-world components using JavaScript. Delve into dropdown menus, auto-validating forms, autocomplete search, infinite scroll, and tooltips to tackle common frontend challenges seamlessly.

Learn to apply your introductory knowledge of HTML, CSS, and JavaScript to build beautiful, real-world components. In this course, you'll go through the process of developing several complex components, including:

- eBay's dropdown menu
- Gmail's auto-validating form
- Google's main autocomplete enabled search
- Twitter's infinitely scrolling list
- Medium's tooltips

You'll learn how to approach common frontend challenges, what questions to ask yourself, how to design solutions once you've thought of them, how to debug and work with mistakes, and more.

The end-goal is to empower you to look at anything you see on a website and be able to say, "I can build that!"

Intermediate JavaScript: Building Frontend Components

## Toggling submenu visibility
First thing's first: the submenu shouldn't be visible when a menu item isn't hovered over. Let's set the `display: none` property to be the default state, and when a menu item is hovered, it toggles back to `display: block`.

# Toggling submenu visibility
First thing's first: the submenu shouldn't be visible when a menu item isn't hovered over. Let's set the `display: none` property to be the default state, and when a menu item is hovered, it toggles back to `display: block`.

This lesson is a step-by-step guide on how to implement a working dropdown menu in JavaScript.

Welcome

Building a Dropdown Menu

Building the Autocomplete Search

Building Tooltips

Building an Autovalidating Form

Building an Infinite List

From Toy Components to Production

Implementing the Behavior of Dropdown Menu

Toggling submenu visibility #