Using setInterval() to do simplistic continuous polling
From my comment:
I would use setTimeout [docs] and always call it when the previous response was received. This way you avoid possible congestion or function stacking or whatever you want to call it, in case a request/response takes longer than your interval.
So something like this:
function refresh() { // make Ajax call here, inside the callback call: setTimeout(refresh, 5000); // ...}// initial call, or just call refresh directlysetTimeout(refresh, 5000);
A simple non-blocking poll function can be implemented in recent browsers using Promises:
var sleep = time => new Promise(resolve => setTimeout(resolve, time))var poll = (promiseFn, time) => promiseFn().then( sleep(time).then(() => poll(promiseFn, time)))// Greet the World every secondpoll(() => new Promise(() => console.log('Hello World!')), 1000)
You can do just like this:
var i = 0, loop_length = 50, loop_speed = 100;function loop(){ i+= 1; /* Here is your code. Balabala...*/ if (i===loop_length) clearInterval(handler);}var handler = setInterval(loop, loop_speed);