Creating value types with minimal boilerplate

value

// Sometimes you'll need a value type; for representing a point, or other values
// which are fully defined after construction. If we take the example of a point:

class Point {
    constructor(public x: number, public y: number) {
        return Object.freeze(this);
    }
}

let p = new Point(3, 4);
console.log(p) // ==> Point {x: 3, y: 4}
p.x = 20
console.log(p) // ==> Point {x: 3, y: 4}

// as you can see, the x and y values of p remain unchanged; any mutation won't cause 
// an exception, unless you use strict mode.