I found a better way to implement this with promises:
function debounce(inner, ms = 0) {
let timer = null;
let resolves = [];
return function (...args) {
// Run the function after a certain amount of time
clearTimeout(timer);
timer = setTimeout(() => {
// Get the result of the inner function, then apply it to the resolve function of
// each promise that has been created since the last time the inner function was run
let result = inner(...args);
resolves.forEach(r => r(result));
resolves = [];
}, ms);
return new Promise(r => resolves.push(r));
};
}
I still welcome suggestions, but the new implementation answers my original question about how to implement this function without a dependency on EventEmitter (or something like it).