How do I hide/reveal a single item that is generated by Flask?

 {{i['homeTeamScore']}} - {{i['awayTeamScore']}} 

Reveal score

    document.querySelector("tbody").onclick = function(e){
        // Find out which elem which was clicked
        const clicked_elem = e.target;

        // If this clicked elem is a button, then execute our code
        if (clicked_elem.tagName == "BUTTON"){
            // First identify which button was clicked
            const index = clicked_elem.dataset.index

            // Now get the td corresponding to that button
            var x = document.getElementById("score_" + index);

            if (x.style.display === "block") {
              x.style.display = "none";
            } else {
              x.style.display = "block";
            }
        }
      
    }