Toggle between functions

var btn = document.getElementsByTagName("button");

var click = 0;

function toggleFunction(click) {
  
    if(click % 2 === 0) {
      
      playerA();
      
    }
    else {
      playerB();
      
    }
  
}

toggleFunction(click);

 function playerA() {
    for(let i = 0; i <btn.length; i++) {
        btn[i].addEventListener("click", () => {
            // do something
            click++;
        });
    }
   return click;
 }

btn.addEventListener("click", () => {
    // do something
    var clicked = this.getAttribute('data-clicked');
    if (clicked == 0)
        playerA();
    else
        playerB();
    this.setAttribute('data-clicked', !clicked);
});