Dmitri Pavlutin

I help developers understand JavaScript and React

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"javascript" posts

Don't Confuse Function Expressions and Function Declarations in JavaScript

javascript function

May 4, 2021

How to Use ECMAScript Modules in Node.js

javascript module nodejs

April 27, 2021

Solving a Mystery Behavior of parseInt() in JavaScript

javascript number

April 20, 2021

How to Use Array Reduce Method in JavaScript

javascript array reduce

April 13, 2021

3 Ways to Merge Arrays in JavaScript

javascript array

April 6, 2021

The Difference Between Values and References in JavaScript

javascript object

March 23, 2021

How to Implement a Queue in JavaScript

javascript computer science data structure queue

March 16, 2021

A Helpful Algorithm to Determine "this" value in JavaScript

javascript this function

March 9, 2021

7 Interview Questions on "this" keyword in JavaScript. Can You Answer Them?

javascript this interview

February 23, 2021

7 Interview Questions on JavaScript Closures. Can You Answer Them?

javascript closure interview

February 9, 2021

What's a Method in JavaScript?

javascript function method

February 2, 2021

array.sort() Does Not Simply Sort Numbers in JavaScript

javascript array number sort

January 26, 2021

The New Array Method You'll Enjoy: array.at(index)

javascript array

January 12, 2021

Why Promises Are Faster Than setTimeout()?

javascript promise event loop

December 29, 2020

Everything About Callback Functions in JavaScript

javascript function

December 22, 2020

5 Best Practices to Write Quality JavaScript Variables

javascript variable clean code

December 1, 2020

Type checking in JavaScript: typeof and instanceof operators

javascript typeof instanceof

November 24, 2020

3 Ways to Check if a Variable is Defined in JavaScript

javascript variable undefined

November 17, 2020

What Makes JavaScript JavaScript? Prototypal Inheritance

javascript prototype inheritance

November 3, 2020

How to Learn JavaScript If You're a Beginner

javascript craftsmanship

October 20, 2020

A Simple Explanation of JavaScript Iterators

javascript iterable iterator array

October 6, 2020

Everything about null in JavaScript

javascript null object

September 22, 2020

Getting Started with Arrow Functions in JavaScript

javascript arrow function function

September 8, 2020

An Interesting Explanation of async/await in JavaScript

javascript async await

September 1, 2020

Is it Safe to Compare JavaScript Strings?

javascript equality string

August 18, 2020

How to Access Object's Keys, Values, and Entries in JavaScript

javascript object

August 11, 2020

What Actually is a String in JavaScript?

javascript string

August 4, 2020

3 Ways to Shallow Clone Objects in JavaScript (w/ bonuses)

javascript object

July 28, 2020

Checking if an Array Contains a Value in JavaScript

javascript array

July 21, 2020

A Simple Explanation of Event Delegation in JavaScript

javascript event delegation

July 14, 2020

3 Ways to Detect an Array in JavaScript

javascript array

June 30, 2020

3 Ways to Check If an Object Has a Property in JavaScript

javascript object

June 16, 2020

How to Compare Objects in JavaScript

javascript equality object

June 8, 2020

Object.is() vs Strict Equality Operator in JavaScript

javascript equality

May 31, 2020

Own and Inherited Properties in JavaScript

javascript prototype inheritance object

May 24, 2020

5 Differences Between Arrow and Regular Functions

javascript function arrow function

May 16, 2020

How to Use Object Destructuring in JavaScript

javascript destructuring

May 10, 2020

5 JavaScript Scope Gotchas

javascript scope variable

April 26, 2020

A Simple Explanation of Scope in JavaScript

javascript scope variable

April 20, 2020

How && and || Operators Really Work in JavaScript

April 9, 2020

The Module Import in JavaScript Has a Drawback

javascript es2015 module

April 1, 2020

Why for...of Loop in JavaScript is a Gem

March 25, 2020

Handy Tips on Using console.log()

javascript debugging

March 18, 2020

What Happens When a Module Is Imported Twice?

javascript es2015 module

March 10, 2020

3 Rules of React State Management

javascript react state

March 4, 2020

4 Best Practices to Write Quality JavaScript Modules

javascript module clean code

February 26, 2020

4 Ways to Swap Variables in JavaScript

javascript variable

February 19, 2020

3 Ways To Access Object Properties in JavaScript

javascript object destructuring

February 5, 2020

5 Best Practices to Write Quality Arrow Functions

javascript arrow function clean code

January 29, 2020

String Interpolation in JavaScript

javascript string es2015

January 22, 2020

NaN in JavaScript

javascript number

January 8, 2020

How To Use Correctly JavaScript Utility Libraries

javascript module

January 2, 2020

3 Ways To Replace All String Occurrences in JavaScript

javascript string

December 24, 2019

Infinity in JavaScript

javascript number

December 17, 2019

The Complete Guide to JavaScript Classes

javascript class instanceof

December 11, 2019

Type Checking in JavaScript is Slightly Screwed

javascript typeof instanceof

December 3, 2019

15 Common Operations on Arrays in JavaScript (Cheatsheet)

javascript array

November 20, 2019

A Simple Explanation of JavaScript Closures

javascript closure scope

October 25, 2019

7 Simple but Tricky JavaScript Interview Questions

javascript closure array hoisting interview

October 15, 2019

When to Use Map instead of Plain JavaScript Object

javascript map object

October 9, 2019

Don't Use JavaScript Variables Without Knowing Temporal Dead Zone

javascript variable tdz es2015

October 1, 2019

Let's Master JavaScript Function Parameters

javascript function parameter

September 17, 2019

How to Handle Easily 'this' in JavaScript

javascript this

September 11, 2019

How To Accelerate the JavaScript Spread Operator

javascript spread performance

September 3, 2019

5 Handy Applications of JavaScript Array.from()

javascript array es2015

August 27, 2019

How to Use JavaScript Optional Chaining

javascript optional chaining nullish coalescing

August 21, 2019

5 Interesting Uses of JavaScript Destructuring

javascript destructuring rest es2015

August 15, 2019

Arrow Functions Shortening Recipes in JavaScript

javascript arrow function es2015

July 30, 2019

5 JavaScript Bad Coding Habits to Unlearn Right Now

javascript undefined clean code craftsmanship

July 10, 2019

How to Use forEach() to Iterate an Array in JavaScript

javascript array foreach

July 3, 2019

An Easy Guide to Object Rest/Spread Properties in JavaScript

javascript spread rest

January 3, 2018

7 Tips to Handle undefined in JavaScript

javascript undefined

April 15, 2017

Announcing Voca: The Ultimate JavaScript String Library

javascript string open source

December 14, 2016

The Path of Software Development Craftsmanship

javascript craftsmanship

September 21, 2016

What every JavaScript developer should know about Unicode

javascript string unicode

September 14, 2016

The Art of Writing Small and Plain Functions

javascript function clean code

August 31, 2016

How to Iterate Easily Over Object Properties in JavaScript

javascript object

August 23, 2016

Make your JavaScript Code Shine: Knockout Old ES5 Hacks (Part 2)

javascript es2015

August 17, 2016

Make your JavaScript Code Shine: Knockout Old ES5 Hacks

javascript es2015

August 10, 2016

Detailed Overview of Well-known Symbols

javascript symbol es2015

August 3, 2016

JavaScript Variables Lifecycle: Why let Is Not Hoisted

javascript variable hoisting

July 27, 2016

Why Object Literals in JavaScript Are Cool

javascript object es2015

July 20, 2016

Must Know Details about ES2016 Features

javascript es2016

July 12, 2016

Yes. JavaScript Rises.

July 4, 2016

Power Up the Array Creation in JavaScript

javascript array

June 28, 2016

6 Ways to Declare JavaScript Functions

javascript function

June 22, 2016

How Three Dots Changed JavaScript

javascript spread rest iterable iterator

June 14, 2016

When 'Not' to Use Arrow Functions

javascript arrow function function

June 6, 2016

JavaScript Variables Hoisting in Details

javascript variable hoisting es2015

May 30, 2016

Gentle Explanation of "this" in JavaScript

javascript this

May 22, 2016

Inheritance in JavaScript: Understanding the constructor Property

javascript constructor instanceof

May 1, 2016

Catch the XMLHttpRequest in Plain JavaScript

January 24, 2016

The Magic Behind Array Length Property

javascript array

January 17, 2016

The Legend of JavaScript Equality Operator

javascript equality

January 4, 2016

JavaScript Addition Operator in Details

javascript addition

January 2, 2016