this Binding Rules in JavaScript

// Global context
console.log(this); // window (browser) or global (Node)

// Object method
const obj = {
  name: 'Object',
  greet() {
    console.log(this.name); // 'Object'
  }
};

// Function context
function regular() {
  console.log(this); // window or undefined (strict)
}

// Arrow functions
const arrow = () => {
  console.log(this); // inherits from parent
};