How To Use Multiple Xmlhttprequest.responsetext Values?

In javascript, how can I best combine multiple values which are obtained as arguments to callback functions only, preferably without adding library dependencies? E.g. consider func

Solution 1:

Apparently the async/wait keywords are what I was looking for. With these my mockup example can be written as

asyncfunctionasync_await_2(){
    var jobs = newPromise(function(resolve,reject){
        var req = newXMLHttpRequest();
        req.open('GET', '/jobs');
        req.onload = function() { resolve(req.responseText); };
        req.send();
    });
    var some = newPromise(function(resolve,reject){
        var handle = someAsyncAPI();
        handle.callback = resolve;
        handle.send();
    });
    var other = newPromise(function(resolve,reject){ 
        otherAsyncAPI(resolve); 
    });
    console.log({
        mode: 'async-await',
        jobs: await jobs,
        some: (await some).value,
        other: (await other).value});
}

or alternatively (might cause sequential instead of parallel execution of the promises)

asyncfunctionasync_await(){
    // Concise, but sacrifices parallelism of the Promises?var jobs = awaitnewPromise(function(resolve,reject){
        var req = newXMLHttpRequest();
        req.open('GET', '/jobs');
        req.onload = function() { resolve(req.responseText); };
        req.send();
    });
    var some = awaitnewPromise(function(resolve,reject){
        var handle = someAsyncAPI();
        handle.callback = resolve;
        handle.send();
    });
    var other = awaitnewPromise(function(resolve,reject){ 
        otherAsyncAPI(resolve); 
    });
    console.log({
        mode: 'async-await',
        jobs: jobs,
        some: some.value,
        other: other.value});
}