Detecting when button is clicked using Javascript based off of custom attribute name?

How would I detect when this button

<button class="btn btn-mobile btn-page-next btn-next-residency" data-name="btn-page-next" type="button">CONTINUE<i class="icon-arrow-thin-right"></i><i class="spinner"></i></button>

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is clicked? I tried :

    function _dtmCheckContinue(){
        document.body.addEventListener('click', function(event) { 
	      if((event.target.dataset)&&(event.target.type == "button")){ 
             if(event.target.dataset.value == "btn-grp-next"){
             console.log("<=====> CONTINUE BUTTON CLICKED");
             }
          }
      
        });
    }

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I can never get into the if statement on line 4 so obviously there is an issue there.

Thanks!