JSFiddle - React, Tailwind, and code Playground

JavaScript

//set up master deferred, to observe the states of the sub-deferreds
var master_dfd = new $.Deferred;
master_dfd.done(function() { alert('done'); });

//set up sub-deferreds
var dfds = [new $.Deferred, new $.Deferred, new $.Deferred];
var cb = function() {
    if (dfds.filter(function(dfd) {
        return /resolved|rejected/.test(dfd.state());
    }).length == dfds.length)
        master_dfd.resolve();
};
dfds.forEach(function(dfd) { dfd.always(cb, cb); });

//resolve or reject sub-deferreds. Master deferred resolves only once
//all are resolved or rejected
dfds[0].resolve();
dfds[1].reject();
dfds[2].resolve();