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@@ -0,0 +1,55 @@
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+<!DOCTYPE html>
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+<html lang="en">
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+<head>
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+ <meta charset="UTF-8">
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+ <meta name="viewport" content="width=device-width, initial-scale=1.0">
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+ <title>Document</title>
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+</head>
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+<body>
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+ <div class="container">
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+ <div class="list-item">
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+ <span>div1</span>
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+ <button class="up-btn">向上按钮</button>
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+ <button class="down-btn">向下按钮</button>
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+ </div>
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+ <div class="list-item">
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+ <span>div2</span>
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+ <button class="up-btn">向上按钮</button>
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+ <button class="down-btn">向下按钮</button>
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+ </div>
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+ <div class="list-item">
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+ <span>div3</span>
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+ <button class="up-btn">向上按钮</button>
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+ <button class="down-btn">向下按钮</button>
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+ </div>
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+ </div>
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+ <script>
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+ var upBtn = document.getElementsByClassName("up-btn");
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+ var downBtn = document.getElementsByClassName("down-btn");
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+
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+ var oContainer = document.getElementsByClassName("container")[0];
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+ for(var i=0;i<upBtn.length;i++){
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+ downBtn[i].onclick = function(){
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+ var oParent = this.parentElement;
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+ var nextParent = oParent.nextElementSibling;
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+ // console.log(nextParent);
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+ if(nextParent){
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+ oContainer.insertBefore(nextParent,oParent)
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+ }else{
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+ console.log("到底了")
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+ }
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+ // js中除了 undefind null ""(空字符) 0 false 其他全为真;
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+ }
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+ upBtn[i].onclick = function(){
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+ var oParent = this.parentElement;
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+ var preParent = oParent.previousElementSibling;
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+ if(preParent){
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+ oContainer.insertBefore(oParent,preParent);
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+ }else{
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+ console.log("到顶了")
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+ }
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+ }
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+ }
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+ </script>
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+</body>
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+</html>
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