Question

I m trying to insert a node both before and after a existing node. The problem is, it will only insert one of them. Odd. Can anyone explain why?

这里的法典

// create your new node <p>Hi</p>
 var newNode = document.createElement("p");
 newNode.appendChild(document.createTextNode("Hi"));

// a existing node for reference
var refNode = document.getElementById("xyz");

// insert newNode before refNode
refNode.parentNode.insertBefore(newNode, refNode);

// insert newNode after refNode
refNode.parentNode.insertBefore(newNode, refNode.nextSibling);

PS 感谢karim79 。回答我的在之后插入的序言问题。

Answer 1

当你在文件上添加一个节点时,必须将其从以前的任何地点删除。同一节点不能在两个地点。

你们想要的是第二处点 no子的复印件:

// create your new node <p>Hi</p>
var newNode = document.createElement("p");
newNode.innerHTML = "Hi";

// a existing node for reference
var refNode = document.getElementById("xyz");

// insert newNode before refNode
refNode.parentNode.insertBefore(newNode, refNode);

// insert newNode after refNode
refNode.parentNode.insertBefore(newNode.cloneNode(true), refNode.nextSibling);

Answer 2

只有一个<代码>新编号。插入斜体,环绕。

Answer 3

insert after (single llinked list list node *previous,single linked list node*new node)
     {
  if(new node==null)
    return;
else{
    if(previous==null)
    add first(new node);
else{
   single linked list node*nex=previous->;
   previous->next=new node;
   new node-> next=next;
      }
    }
  }

友情链接