JS Promisees vs. Monads

ispromiseamonad.js

// Axioms

unit(value).bind(f) <=> f(value);

monad.bind(unit) == monad;

monad.bind(f).bind(g) == monad.bind(value => f(value).bind(g))

// Promise

Promise.resolve(value).then(f) <=> f(value)

promise.then(Promise.resolve) == promise

promise.then(f).then(g) != promise.then(value => f(value).then(g)) // f for promises can return value or promise - fail