thenable.md

Thenable

Thenable object (an object with then method)

thenable/is

Confirms if given object is a thenable

const isThenable = require("type/thenable/is");

isThenable(Promise.resolve()); // true
isThenable({ then: () => {} }); // true
isThenable({}); // false

thenable/ensure

If given argument is a thenable object, it is returned back. Otherwise TypeError is thrown.

const ensureThenable = require("type/thenable/ensure");

const promise = Promise.resolve();
ensureThenable(promise); // promise
ensureThenable({}); // Thrown TypeError: [object Object] is not a thenable object