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The ultimate guide to web development interviews. Developed by FAANG engineers, practice with real-world interview questions covering network security, system design, SEO, APIs, and more.

oct6.tar.gz

server

JavaScript

Grunt

webpack

webpack-loaders

Grunt-eslint

ProgressiveRendering

webpack-code-splitting

This course compiles a comprehensive range of questions that are most likely to be asked during the frontend interview. Where many interview prep courses focus on data structures and algorithms, this course focuses on a variety of topics from network security to system design.

In this course, you will solve interview questions that cover general aspects of web development. You’ll start by going over network security and optimization techniques for load balancing and browser rendering. After that, you’ll move on to interview questions around SEO, APIs, and system design.

Overall, these are questions that are often overlooked, but they can really make you stand out from your peers. By the end of this course, you will have the confidence and ability to go in and ace that interview.

Web Development Interview Handbook

## Introduction
Here's the official definition of Web Components:
> "Web Components is a suite of different technologies allowing you to create reusable custom elements — with their functionality encapsulated away from the rest of your code — and utilize them in your web apps." <br> --- [MDN](https://developer.mozilla.org/en-US/docs/Web/Web_Components).

In English, that just means that Web Components are a way for you to create your own HTML tags that you can reuse later.

Front-end frameworks like React or Vue have their own set of components (buttons and such) with all the JavaScript functionality and styling included. Web Components work a lot like those components. You can actually easily integrate Web Components with something like React.


There are three primary ways that Web Components can be created. They *can* be used individually, but generally, they are all used together to create a web component.


## Custom elements
Custom elements give us the capability to create our own tags. A custom element can be created by adding a class to the page's JavaScript.


Let's look at the two different kinds of custom elements.

### Autonomous custom elements 
Autonomous custom elements can be used to create an entirely new tag from scratch. 

In the code example below, for instance, we're creating a new element or tag called `<lesson-section>`. Let's take a look at each file.

#### JavaScript
   - **Line 1**: Declaring a class called `Lesson` that is built upon the `HTMLElement` class.
   - **Line 2**: Declaring a definition for the constructor. The constructor is usually used to instantiate any state and event listeners. It's always called whenever an instance of the element (or class) is created or upgraded.
   - **Line 3**: Calling the constructor of the `HTMLElement` class, `super();`
   - **Line 4**: Setting the inner HTML of the tag. It's enclosed in `<h3>` tags, so any global styling via the CSS style sheet on `<h3>` would be applied to the inner HTML. `this.getAttribute('heading')`  'gets' us the value of the `heading` attribute passed to the tag.
   - **Line 8**: This line is used to define the custom element. The following function is used to do so: `window.customElements.define(<tag-name>, <ClassName>);`. Note that the tag name must have a hyphen.

#### HTML

**Lines 5-7** are of interest. The tag `<lesson-section>` is instantiated with the `heading` attribute passed in. This is much like the `href` attribute getting passed into the hyper link `<a>` tag.

# Introduction
Here's the official definition of Web Components:
> "Web Components is a suite of different technologies allowing you to create reusable custom elements — with their functionality encapsulated away from the rest of your code — and utilize them in your web apps." <br> --- [MDN](https://developer.mozilla.org/en-US/docs/Web/Web_Components).

In English, that just means that Web Components are a way for you to create your own HTML tags that you can reuse later.

Front-end frameworks like React or Vue have their own set of components (buttons and such) with all the JavaScript functionality and styling included. Web Components work a lot like those components. You can actually easily integrate Web Components with something like React.


There are three primary ways that Web Components can be created. They *can* be used individually, but generally, they are all used together to create a web component.


# Custom elements
Custom elements give us the capability to create our own tags. A custom element can be created by adding a class to the page's JavaScript.


Let's look at the two different kinds of custom elements.

## Autonomous custom elements 
Autonomous custom elements can be used to create an entirely new tag from scratch. 

In the code example below, for instance, we're creating a new element or tag called `<lesson-section>`. Let's take a look at each file.

### JavaScript
   - **Line 1**: Declaring a class called `Lesson` that is built upon the `HTMLElement` class.
   - **Line 2**: Declaring a definition for the constructor. The constructor is usually used to instantiate any state and event listeners. It's always called whenever an instance of the element (or class) is created or upgraded.
   - **Line 3**: Calling the constructor of the `HTMLElement` class, `super();`
   - **Line 4**: Setting the inner HTML of the tag. It's enclosed in `<h3>` tags, so any global styling via the CSS style sheet on `<h3>` would be applied to the inner HTML. `this.getAttribute('heading')`  'gets' us the value of the `heading` attribute passed to the tag.
   - **Line 8**: This line is used to define the custom element. The following function is used to do so: `window.customElements.define(<tag-name>, <ClassName>);`. Note that the tag name must have a hyphen.

### HTML

**Lines 5-7** are of interest. The tag `<lesson-section>` is instantiated with the `heading` attribute passed in. This is much like the `href` attribute getting passed into the hyper link `<a>` tag.

The Web Components API can allow you to reuse code and develop a personal style with ease. Let's learn about them in this lesson.

Introduction

Network

Security

Optimizing Loading Performance

Optimizing Browser Rendering Performance

Search Engine Optimization

System Design

APIs

Testing

Version Control

Task Runners & Bundlers

Conclusion

Web Components

Introduction

Custom elements