TypescriptOptional.ts

const NoSuchElementException = new Error("No such element exception");

class Optional<T> {

    value: T;

    constructor(value: T) {
        this.value = value;
    }

    static empty() {
        return new Optional(null);
    }

    static of(value) {
        return new Optional(value);
    }

    get(): T {
        if (!this.value) {
            throw NoSuchElementException;
        } else {
            return this.value;
        }
    }

    isPresent(): boolean {
        return (this.value !== undefined && this.value !== null);
    }

}

function div(a: number, b: number): Optional<number> {
    if (b === 0) {
        return Optional.empty();
    } else {
        return Optional.of(a/b);
    }
}


let result: Optional<number> = div(3, 1);

if (result.isPresent()) {
    console.log(`Everytihng OK: ${result.get()}`);
} else {
    console.log("There is no value");
}

Based on Java Optional