TypeScript static property decorator example

property_decorators_part_2.1.ts

/**
 * Декоратор для логирования статических свойств
 * @param target
 * @param key
 */
function log_static_prop(target:any, key:string):any {
	var val = target[key];
	return {
		get: ():any => {
			console.log(`Get: ${key} => ${val}`);
			return val;
		},
		set: (newVal):void => console.log(`Set: ${key} => ${newVal}`)
	}
}

class Person {

	public name:string;
	public surname:string;

	@log_static_prop public static vip:boolean = false;

	constructor(name:string, surname:string) {
		this.name = name;
		this.surname = surname;
	}
}


let me = new Person("Alex", "Mayorov");

Person.vip;
Person.vip = true;
Person.vip;

/* Output:

Get: vip => false
Set: vip => true
Get: vip => false

*/