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Douglas Crockford is a software architect and language designer best known for his work on JavaScript, JSON, and for his ...

Let's model the turn-based battle mechanics of the Pokémon games while following object oriented design principles. GET THE ...

In JavaScript, trimStart removes whitespace from the start of a string. In contrast, trimEnd removes whitespace from the end of a ...

A quick look at the Ecma Script 2025 features. Topics: - JavaScript 2025; - Global iterator; - Set methods; - JSON modules; ...

Welcome to the JavaScript Design Patterns course, a 10-part advanced series for developers who want to write cleaner, scalable, ...

toLowerCase and toUpperCase in JavaScript do two complementary things in JavaScript. toLowerCase converts a string to all ...

The word Polymorphism comes from the Greek words for "many forms." In object-oriented programming, it represents a powerful ...

In JavaScript, the typeof operator returns a string representing the type of whatever operand you put to the right of typeof. Many of ...

Understanding Object-Oriented Programming (OOP) can feel tricky at first, but it doesn't have to be. In this video, I share a ...

Why Most Developers Don't Understand "this" in JavaScript | JS OOP Tutorial In this tutorial, you will learn why this keyword in ...

Today we're going to be talking about the DOM, or the document object model. So as you may or may not remember, every ...

Welcome to the JavaScript Design Patterns course, a 10-part advanced series for developers who want to write cleaner, scalable, ...

Welcome to the JavaScript Design Patterns course, a 10-part advanced series for developers who want to write cleaner, scalable, ...

In JavaScript, string lastIndexOf returns the index of the last occurrence of a given substring within a string. Optionally, you can ...

In JavaScript, the array entries method returns an array iterator containing each array item's index and value. This video shows ...

... Programming (OOP) & Prototypes 04:35 Mutating vs. Non-Mutating Array Methods 05:04 Asynchronous JavaScript & the Event ...

In JavaScript, the array keys method returns an array iterator containing each array item's index. This video shows using a while ...

This video shows how to reverse a string in JavaScript by chaining the split, reverse, and join string, array, and string methods ...

Welcome to the JavaScript Design Patterns course, a 10-part advanced series for developers who want to write cleaner, scalable, ...

This video shows how to remove duplicates from a string in JavaScript. It uses the set constructor, the spread operator and the join ...