Chaining promises with async\await in TypeScript.

async_await_chain.ts

let combine = (num: number, combiner: number = num) => {
    return new Promise<any>((resolve, reject) => {
        resolve(num + combiner);
    });
};

let multiple = (num: number, multiplier: number = num) => {
    return new Promise<any>((resolve, reject) => {
        resolve(num * multiplier);
    });
};

let divide = (num: number, divider: number = 10) => {
    return new Promise<any>((resolve, reject) => {
        resolve(num / divider);
    });
};

async function getResult(num : number) {
    let combined = await combine(num);
    let multiplied = await multiple(combined);
    return await divide(multiplied);
}

let result = getResult(4).then((data) => {
    console.log(data);
});