The ultimate guide to coding interviews: Learn and practice JavaScript design patterns tested by FAANG engineers. Get interview-ready in just a few hours with battle-tested solutions.

If you're an experienced developer, chances are your interviewer won't ask you about language syntax. Instead, they'll focus on things that test your understanding of software architecture, and how capable you are at finding optimized solutions to given problems. 

That’s where a strong understanding of design patterns comes in handy. It's often useful to be able to draw on established patterns instead of reinventing the wheel.

In this course, you will learn how to effectively deploy design patterns to answer interview questions. The course is divided into four sections: Creational Patterns, Structural Patterns, Behavioral Patterns, and Architectural Patterns. Each section has its own set of design patterns which you’ll learn to use through various challenges. 

Every challenge contains a detailed solution explanation. By the end of this course (and with some practice), you will be able to confidently use design patterns to tackle advanced coding interview questions in JavaScript.

JavaScript Design Patterns for Coding Interviews

In this chapter, we will discuss behavioral patterns. These patterns ensure effective communication between different objects in a system, assign responsibilities to them, and make sure they all have synchronized information.

These behavioral patterns include: 

* *Chain of responsibility*

* *Interpreter*

* *Command*

* *Iterator*

* *Mediator*

* *Memento*

* *State*

* *Template Method*

* *Strategy*

* *Visitor*

* *Observer*

* *Revealing Module*
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We won't be able to cover all the patterns mentioned above in this chapter. From the list above, we will be covering the following: *chain of responsibility pattern*, *command pattern*, *iterator pattern*, *mediator pattern*, *observer pattern*, and *visitor pattern*.

This lesson explains what behavioral patterns are and goes over the patterns that we'll cover in this chapter.

Before We Begin

Introduction To Design Patterns

Creational Patterns

Structural Patterns

Behavioral Patterns

Architectural Patterns

Conclusion

Introduction

What are behavioral patterns?