每次点击都会为索引添加1

Question

我正在尝试这样做，所以它在每次点击时为z索引添加1，所以它就像101,102,103 ......

st[0].onclick = function () {

        var z = 100;
        document.getElementById(current).style.display = "block";
        document.getElementById(current).style.zIndex = z++;
        current = state;
    };

Answer 1

将你的z移到你的功能之外。

var z = 100;

st[0].onclick = function () {
        document.getElementById(current).style.display = "block";
        document.getElementById(current).style.zIndex = z++;
        current = state;
    };