class MyClass {
    constructor() {
    }

    public Operator > (value: any):boolean {
        // compare value
    }
}

var myClass = new MyClass();

if(myClass > otherValue){
    // Do stuff
}

var MyClass = (function () {
    function MyClass() {
    }
    MyClass.prototype.greaterThan = function (value) {
        // compare value
    };
    return MyClass;
})();
var myClass = new MyClass();
if (myClass.greaterThan(otherValue) {
    // do Stuff
}