How to pass data to onkeyup event

Question

I am trying to pass data from my inputfield to my onkeyup event, but it doesn't work.

I have a simple field:

<lightning:inputField fieldName="Name" onkeyup="{! c.onmouseup}" data-tab="information"/>

I have a simple handler:

onmouseup : function(component, event, helper) {
    var ctarget = event.currentTarget;
    var tab = ctarget.dataset.tab;
    alert(tab);
},

It say ctarget is null, what am I doing wrong?

Answer 1

This is the model I've found to work:

onmouseup : function(cmp, event, helper) {
  let tab = event.currentTarget.getAttribute('data-tab');
  alert(tab);
},