javascript切换显示按钮，40个相同的按钮不需要40个javascript文件

<button id="toggleButton">切换显示</button>

var toggleButton = document.getElementById("toggleButton");
toggleButton.addEventListener("click", toggleDisplay);

function toggleDisplay() {
  var buttons = document.getElementsByClassName("toggleButton");
  for (var i = 0; i < buttons.length; i++) {
    if (buttons[i].style.display === "none") {
      buttons[i].style.display = "block";
    } else {
      buttons[i].style.display = "none";
    }
  }
}

<button class="toggleButton">按钮1</button>
<button class="toggleButton">按钮2</button>
<!-- ... 其他按钮 ... -->
<button class="toggleButton">按钮40</button>