if( !Element.prototype.insertAfter ) {
    Element.prototype.insertAfter = function(item, reference) {
        if( reference.nextSibling )
            reference.parentNode.insertBefore(item, reference.nextSibling);
        else
            reference.parentNode.appendChild(item);
    };
}

insertBefore()方法的使用与parentNode.insertBefore()类似。 因此，为了模仿这一点并创建一个方法parentNode.insertAfter()，我们可以编写以下代码。

JavaScript

Node.prototype.insertAfter = function(newNode, referenceNode) {
    return referenceNode.parentNode.insertBefore(
        newNode, referenceNode.nextSibling); // based on karim79's solution
};

// getting required handles
var refElem = document.getElementById("pTwo");
var parent = refElem.parentNode;

// creating <p>paragraph three</p>
var txt = document.createTextNode("paragraph three");
var paragraph = document.createElement("p");
paragraph.appendChild(txt);

// now we can call it the same way as insertBefore()
parent.insertAfter(paragraph, refElem);

HTML

<div id="divOne">
    <p id="pOne">paragraph one</p>
    <p id="pTwo">paragraph two</p>
</div>

注意，如本文所述，扩展DOM可能不是适合您的解决方案。

然而，这篇文章写于2010年，现在的情况可能有所不同。所以你自己决定吧。

多面体JavaScript()方法

快速搜索谷歌会显示这个脚本

// create function, it expects 2 values.
function insertAfter(newElement,targetElement) {
    // target is what you want it to go after. Look for this elements parent.
    var parent = targetElement.parentNode;

    // if the parents lastchild is the targetElement...
    if (parent.lastChild == targetElement) {
        // add the newElement after the target element.
        parent.appendChild(newElement);
    } else {
        // else the target has siblings, insert the new element between the target and it's next sibling.
        parent.insertBefore(newElement, targetElement.nextSibling);
    }
}

步骤1。准备要素:

var element = document.getElementById('ElementToAppendAfter');
var newElement = document.createElement('div');
var elementParent = element.parentNode;

步骤2。在后面追加:

elementParent.insertBefore(newElement, element.nextSibling);

insertAfter的健壮实现。

// source: https://github.com/jserz/domPlus/blob/master/src/insertAfter()/insertAfter.js
Node.prototype.insertAfter = Node.prototype.insertAfter || function (newNode, referenceNode) {
  function isNode(node) {
    return node instanceof Node;
  }

  if(arguments.length < 2){
    throw(new TypeError("Failed to execute 'insertAfter' on 'Node': 2 arguments required, but only "+ arguments.length +" present."));
  }

  if(isNode(newNode)){
    if(referenceNode === null || referenceNode === undefined){
      return this.insertBefore(newNode, referenceNode);
    }

    if(isNode(referenceNode)){
      return this.insertBefore(newNode, referenceNode.nextSibling);
    }

    throw(new TypeError("Failed to execute 'insertAfter' on 'Node': parameter 2 is not of type 'Node'."));
  }

  throw(new TypeError("Failed to execute 'insertAfter' on 'Node': parameter 1 is not of type 'Node'."));
};

你可以在新版本的Chrome, Firefox和Opera中调用after()方法。这种方法的缺点是Internet Explorer还不支持它。

例子:

// You could create a simple node
var node = document.createElement('p')

// And then get the node where you want to append the created node after
var existingNode = document.getElementById('id_of_the_element')

// Finally you can append the created node to the exisitingNode
existingNode.after(node)

一个简单的HTML代码来测试: <！DOCTYPE html > < html > 身体< > < p id =“了”> < / p > < p id = "下来“> < / p > <button id="switchBtn" onclick="switch_place()“>开关的地方> < /按钮 <脚本> 函数switch_place () { var downElement = document.getElementById("down") var upElement = document.getElementById("up") downElement.after (upElement); . getelementbyid(“switchBtn”)。innerHTML = "切换!" ｝ > < /脚本 < /身体> < / html >

正如预期的那样，它在向下的元素之后移动向上的元素