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

## The HTML
We'll start with the HTML and layout some basic elements for us to work with.

In general, as you​'re developing on the frontend, you'll find an iterative process with short feedback loops to be the fastest way of progressing. If you're building a JavaScript library, that means continuously​ `console.log`ing or writing small tests after completion of a piece. In our case, we're working towards validating inputs, so it makes sense to have some to work with.


# The HTML
We'll start with the HTML and layout some basic elements for us to work with.

In general, as you​'re developing on the frontend, you'll find an iterative process with short feedback loops to be the fastest way of progressing. If you're building a JavaScript library, that means continuously​ `console.log`ing or writing small tests after completion of a piece. In our case, we're working towards validating inputs, so it makes sense to have some to work with.


Let's set up the basic framework for our auto validating form using the HTML form element. 

Building the Form

Let's set up the basic framework for our auto validating form using the HTML form element.

Welcome

Building a Dropdown Menu

Building the Autocomplete Search

Building Tooltips

Building an Autovalidating Form

Building an Infinite List

From Toy Components to Production

Building the Form

The HTML