Multiple functions in one setInterval()?

Question

I have two setInterval each running a function every 20s. Is there a way to put both functions under the same setInterval call?

setInterval(function(){
 //function a
}, 20000);

setInterval(function(){
 //function b
}, 20000);

To something like:

setInterval( (functionA, functionB) , 20000);

Answer 1

Just call both the functions within another callback function like

setInterval(function () {
    functionA();
    functionB();
}, 20000);