Interfaces are our allies when we use TypeScript, since they do not exist in pure JavaScript. They are an efficient way of grouping and typing variables, ensuring that they are always together, maintaining consistent code. Let's look at a practical way to declare and use an interface: In ...
"Method 1"is to instantiate the properties outside of the constructor using a throw-away value, and then to set the desired value inside the constructor (seeRightTriangle1below). This method has the advantage of being rather simple to program/maintain because TypeScript automatically infers the ...