self adjusting setTimeout

selfAdjustingTimeout.js

setTimeout.dt = 0;
function selfAdjustingTimeout(callback, timeout, args) {
    setTimeout.et = (new Date).getTime() + timeout;
    let cb = () => {
        setTimeout.dt = (new Date).getTime() - setTimeout.et;
        callback();
    };

    setTimeout(cb, timeout - setTimeout.dt, args);
}