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

Let's do a little exploring to account for all the edge cases that aren't apparent at first, but might affect our implementation.

# Case 1:
When there exist multiple results of the same string, the detail is added after a hyphen

# Case 2:
Results seem to assume for some autocorrect, and therefore won't always be prefixed by what's in the input bar. In such cases, the entire result is bolded.

# Case 3:
Results are shown for every character input, including backspace, and only the most recent is shown. Google appears to abort outstanding​ requests if what's in the input bar is no longer the same. This is performance optimization we can ignore for our component.

Before we begin building, we'll analyze Google search Engine's Autocomplete Functionality which is the component that we're aiming to build.

Welcome

Building a Dropdown Menu

Building the Autocomplete Search

Building Tooltips

Building an Autovalidating Form

Building an Infinite List

From Toy Components to Production

Examining Google's Autocomplete Functionality

Case 1: #

Case 2: #

Case 3: