如何让控制器在点击时插入时间，在另一次点击时移除时间？

<button id="controller">点击按钮</button>

document.getElementById("controller").addEventListener("click", function() {
  var currentTime = new Date().toLocaleTimeString();
  document.getElementById("controller").innerHTML = "当前时间：" + currentTime;
});

var isTimeInserted = false;

document.getElementById("controller").addEventListener("click", function() {
  if (isTimeInserted) {
    document.getElementById("controller").innerHTML = "点击按钮";
    isTimeInserted = false;
  } else {
    var currentTime = new Date().toLocaleTimeString();
    document.getElementById("controller").innerHTML = "当前时间：" + currentTime;
    isTimeInserted = true;
  }
});