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'."));
};

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);

简单的JavaScript代码如下:

附加:

element.parentNode.insertBefore(newElement, element);

添加后:

element.parentNode.insertBefore(newElement, element.nextSibling);

但为了便于使用，可以在这里添加一些原型:

通过构建以下原型，您将能够直接从新创建的元素调用这些函数。

newElement.appendBefore(元素); newElement.appendAfter(元素);

.appendBefore(元素)的原型

Element.prototype.appendBefore = function (element) {
  element.parentNode.insertBefore(this, element);
},false;

.appendAfter(元素)的原型

Element.prototype.appendAfter = function (element) {
  element.parentNode.insertBefore(this, element.nextSibling);
},false;

代码片段以查看所有操作:

/* Adds Element BEFORE NeighborElement */ Element.prototype.appendBefore = function(element) { element.parentNode.insertBefore(this, element); }, false; /* Adds Element AFTER NeighborElement */ Element.prototype.appendAfter = function(element) { element.parentNode.insertBefore(this, element.nextSibling); }, false; /* Typical Creation and Setup A New Orphaned Element Object */ var NewElement = document.createElement('div'); NewElement.innerHTML = 'New Element'; NewElement.id = 'NewElement'; /* Add NewElement BEFORE -OR- AFTER Using the Aforementioned Prototypes */ NewElement.appendAfter(document.getElementById('Neighbor2')); div { text-align: center; } #Neighborhood { color: brown; } #NewElement { color: green; } <div id="Neighborhood"> <div id="Neighbor1">Neighbor 1</div> <div id="Neighbor2">Neighbor 2</div> <div id="Neighbor3">Neighbor 3</div> </div>

在JSFiddle上运行它

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

理想情况下，insertAfter应该类似于insertBefore。下面的代码将执行以下操作:

如果没有子节点，则追加新的Node 如果没有引用节点，则追加新节点 如果引用节点后没有节点，则追加新节点 如果引用节点后面有一个兄弟节点，那么新节点将被插入到那个兄弟节点之前 返回新节点

扩展节点

Node.prototype.insertAfter = function(node, referenceNode) {

    if (node)
        this.insertBefore(node, referenceNode && referenceNode.nextSibling);

    return node;
};

一个常见的例子

node.parentNode.insertAfter(newNode, node);

查看代码的运行情况

// First extend Node.prototype.insertAfter = function(node, referenceNode) { if (node) this.insertBefore(node, referenceNode && referenceNode.nextSibling); return node; }; var referenceNode, newNode; newNode = document.createElement('li') newNode.innerText = 'First new item'; newNode.style.color = '#FF0000'; document.getElementById('no-children').insertAfter(newNode); newNode = document.createElement('li'); newNode.innerText = 'Second new item'; newNode.style.color = '#FF0000'; document.getElementById('no-reference-node').insertAfter(newNode); referenceNode = document.getElementById('no-sibling-after'); newNode = document.createElement('li'); newNode.innerText = 'Third new item'; newNode.style.color = '#FF0000'; referenceNode.parentNode.insertAfter(newNode, referenceNode); referenceNode = document.getElementById('sibling-after'); newNode = document.createElement('li'); newNode.innerText = 'Fourth new item'; newNode.style.color = '#FF0000'; referenceNode.parentNode.insertAfter(newNode, referenceNode); <h5>No children</h5> <ul id="no-children"></ul> <h5>No reference node</h5> <ul id="no-reference-node"> <li>First item</li> </ul> <h5>No sibling after</h5> <ul> <li id="no-sibling-after">First item</li> </ul> <h5>Sibling after</h5> <ul> <li id="sibling-after">First item</li> <li>Third item</li> </ul>

可以使用appendChild函数在元素之后插入。

参考:http://www.w3schools.com/jsref/met_node_appendchild.asp