JavaScript 'this' Keyword Tutorial

About This Tutorial

The this keyword is one of JavaScript's most misunderstood features. It refers to the context in which a function is executed, and its value changes depending on how the function is called. Understanding this is essential for writing object-oriented JavaScript and working with event handlers, callbacks, and modern frameworks.

What You'll Learn

• What this is and how it works
• The four binding rules for this
• How arrow functions handle this differently
• Common this pitfalls and how to avoid them
• Practical techniques: bind, call, and apply

Prerequisites

You should be comfortable with JavaScript functions, objects, and basic scope concepts before starting this tutorial.