我有三个div，我希望每次我点击任何一个div，它都会被第二个div替换，这个div应该在中间.
我试过这样做，但没有效果:
function swapDiv(event, elem) {
elem.parentNode.insertBefore(elem, elem.parentNode.secondChild);
}<div class="all-div-container">
<div class="div1" onclick="swapDiv(event,this);">
1
</div>
<div class="div2" onclick="swapDiv(event,this);">
2
</div>
<div class="div3" onclick="swapDiv(event,this);">
3
</div>
</div>1 2 3，当我点击3，结果一定是1 3 2，点击1，结果一定是3 1 2
function swapDiv(event, elem) {
// get all elements in .all-div-container
const allElements = [...elem.parentElement.children];
// get index of target elem
const targetIndex = allElements.indexOf(elem);
// get center element
const centerElem = allElements[1];
// exit from function if we clicked at center elem
if (elem === centerElem) return;
// move center element
if (targetIndex === 0) {
elem.parentElement.prepend(centerElem)
} else {
elem.parentElement.append(centerElem)
}
}<div class="all-div-container">
<div class="div1" onclick="swapDiv(event,this);">
1
</div>
<div class="div2" onclick="swapDiv(event,this);">
2
</div>
<div class="div3" onclick="swapDiv(event,this);">
3
</div>
</div>