This Keyword

Inside the class body this refers to the current class object.

It can be used to access / modify properties and call functions inside the class.

Example

class Rectangle { calcArea() { // Access properties: return this.height * this.width; } printData() { console.log("Width = " + this.width); console.log("Height = " + this.height); // Access class function: let area = this.calcArea(); console.log("Area = " + area); } } var rectangle = new Rectangle(); rectangle.width = 3; rectangle.height = 2; rectangle.printData();

Output:

Width = 3 Height = 2 Area = 6

Explanation:

• At lines 22, 23 values are set to the properties width and height.
• At line 25 the printData function is called. this points to the class object.