I have a component that dynamically creates buttons which, when clicked, apply filters and then re-query the back end for data.

While I can assign onclick events to each button, I can't find a way to call a helper function. 

I have only had success in using pure Javascript to assign

```
myButton.onclick = function(){alert('this works');};

```

but the code needs to pass parameters to the back end and then process and display the results in the DOM, so I really need to be able to call a helper function.

I saw an article saying someone was able to call a helper function, but this doesn't work when onclick is assigned dynamically. I have tried `helper.functionToCall(cmp)`, `this.functionToCall(cmp)`, `this.helper.functionToCall(cmp)`, `functionToCall(cmp)` and many other things.

Is there a way to do this?