typescript type arguments code example

Example 1: typescript class type t

class GenericNumber<T> {
    zeroValue: T;
    add: (x: T, y: T) => T;
}

let myGenericNumber = new GenericNumber<number>();
myGenericNumber.zeroValue = 0;
myGenericNumber.add = function(x, y) { return x + y; };

Example 2: typescript set argument type

// non typed function
function add(x, y) {
  return x + y;
}

// typed function
function add(x: number, y: number): number {
  return x + y;
}

// types can be found here: https://www.typescriptlang.org/docs/handbook/basic-types.html

Example 3: how to make a generic variable in javascript

var x = 1;
var y = 1;
if (x == y) {
  x = x + 1
}