Use debounce in setTimeout

Question

I'm trying to implement debounce from underscore library within setTimeout.

setInterval(function() {
  setTimeout(function(){   
    _.debounce(function() {
      console.log('debounce');
    }, 500);
  }, 1000);
}, 100);

Basically, console.log('debounce') should be called once in 500ms but it seems there's no output at all in the console.

JS Bin for testing: http://jsbin.com/beqisuruwu/edit?js,output

Thanks in advance.

@Gogol no output in the console. So, 'debounce' is not printed out — RubyCat, Oct 19 '16 at 09:05
did you include underscore library before calling the script? Also, try attaching it to an event.. e.g. window load or something.. — Gogol, Oct 19 '16 at 09:08
I did include the library, I can get the value of `_.VERSION` — RubyCat, Oct 19 '16 at 09:10
Ok. try running the script after dom is loaded.. like following http://stackoverflow.com/a/21814964/1437261 — Gogol, Oct 19 '16 at 09:11
Doesn't seem to be working http://jsbin.com/wogumujahi/edit?js,output — RubyCat, Oct 19 '16 at 09:16
Ok, it seems that debounce does not support anonymous functions.. see this answer... http://stackoverflow.com/a/24309963/1437261 basically, define the function and pass it to debounce and see if that works. — Gogol, Oct 19 '16 at 09:19
debounce returns a function which is not called in your code. Create the debounced function outside the `setInterval` e.g. `var myFn = debounce(...)` and call it within the `setTimeout`: `myFn();` — Gruff Bunny, Oct 19 '16 at 11:25
Why use a `setTimeout` and `debounce`? [Underscore's Debounce is a setTimeout](http://underscorejs.org/docs/underscore.html#section-83)... — evolutionxbox, Oct 19 '16 at 11:37

score 0 · Answer 1 · answered Oct 19 '16 at 11:34

Are you sure you need function after setTimeout? Because _.debounce is a function itself. I am not sure either )) but code below works for me:setInterval(function() { setTimeout( _.debounce(function() { console.log('debounce'); }, 500) , 1000); }, 100);

Use debounce in setTimeout

1 Answers1