根据按钮显示特定元素

<button id="btn1">按钮1</button>
<button id="btn2">按钮2</button>

<div id="element1" style="display: none;">元素1</div>
<div id="element2" style="display: none;">元素2</div>

var btn1 = document.getElementById("btn1");
var btn2 = document.getElementById("btn2");
var element1 = document.getElementById("element1");
var element2 = document.getElementById("element2");

btn1.addEventListener("click", function() {
  element1.style.display = "block";
  element2.style.display = "none";
});

btn2.addEventListener("click", function() {
  element1.style.display = "none";
  element2.style.display = "block";
});