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

## Server side
We first want to get to a point where we have our initial set of data. As soon as the window loads, let's pull data from the server and display ​it as a series of tweets.

To know if we've succeeded, the server should have some data.

We'll write a short script to do so:


# Server side
We first want to get to a point where we have our initial set of data. As soon as the window loads, let's pull data from the server and display ​it as a series of tweets.

To know if we've succeeded, the server should have some data.

We'll write a short script to do so:


When the user first loads the page, we need to show some list items right away. We'll learn how to in this lesson!

Welcome

Building a Dropdown Menu

Building the Autocomplete Search

Building Tooltips

Building an Autovalidating Form

Building an Infinite List

From Toy Components to Production

Client Side Hydration

Server side