更改页面时继续显示和隐藏div

<div id="div1">这是要显示和隐藏的内容</div>

var div = document.getElementById("div1");
div.style.display = "none"; // 隐藏div
div.style.display = "block"; // 显示div

var button = document.getElementById("button1");
button.addEventListener("click", function() {
  var div = document.getElementById("div1");
  if (div.style.display === "none") {
    div.style.display = "block"; // 显示div
  } else {
    div.style.display = "none"; // 隐藏div
  }
});