I am creating an array of pills and would like to add a data-* attribute to each item. but unfortunately I get a syntax error.

I tried changing the field name 'data-id' to 'dataId' but still wasn't able to query the field using `event.target.dataset.dataId`.

What is the right syntax for this? 


[Playground][1]


[![enter image description here][2]][2]


  [1]: https://developer.salesforce.com/docs/component-library/tools/playground/AOsUnbTGM/6/edit
  [2]: https://i.sstatic.net/Pydjr.png