Keep object chainable using async methods

Question

Let\'s say I have a class Test with around 10-20 methods, all of which are chainable.

In another method, I have some asynchronous work to do.

Answer 1

I don't think that is it possible to use such syntax for now. It would require to access the promise in the in the function to return it.

Different ways to chain functions:

Promise with then

bob.bar()
    .then(() => bob.baz())
    .then(() => bob.anotherBaz())
    .then(() => bob.somethingElse());

And you could also use compositions, to obtain another style of functional, reusable syntax to chain async and sync functions

const applyAsync = (acc,val) => acc.then(val);
const composeAsync = (...funcs) => x => funcs.reduce(applyAsync, Promise.resolve(x));
const transformData = composeAsync(func1, asyncFunc1, asyncFunc2, func2);
transformData(data);

Or using async / await

for (const f of [func1, func2]) {
  await f();
}