The example in this article describes the method of inserting DOM nodes with JQuery. Share it with everyone for your reference. The specific analysis is as follows:
Dynamically creating HTML elements is of no practical use, as the newly created elements need to be inserted into the document. The simplest way to insert a newly created node into a document is to make it a child node of a node in the document. Previously we used a method append() to insert nodes, which will append the newly created content inside the element.
There is not only one way to insert a newly created node into a document. JQuery also provides other ways to insert nodes, as shown in the table below. Readers can flexibly make a variety of choices based on actual needs.
HTML DOM structure is as follows:
<p class="nm_p" title="欢迎访问脚本之家" >欢迎访问脚本之家</p> <ul class="nm_ul"> <li title='PHP编程'>简单易懂的PHP编程</li> <li title='JavaScript编程'>简单易懂的JavaScript编程</li> <li title='JQuery编程'>简单易懂的JQuery编程</li> </ul>
append()
Append content inside each matching element:
HTML code:
I want to say:
I want to say: Hello
appendTo()
Append all matching elements to the specified element. In fact, using this method reverses the regular $(A).append(B) operation, that is, instead of appending B to A, appending A to B:
HTML code:
I want to say:
I want to say: Hello
prepend()
Prepend content inside each matching element:
HTML code:
I want to say:
Hello I want to say ：
prependTo()
Prepend all matching elements to the specified element. In fact, using this method reverses the regular $(A).prepend(B) operation, that is, instead of prepending B to A, A is prepended to B:
HTML code:
I want to say:
Hello I want to say ：
after()
Insert content after each matching element:
HTML code:
I want to say:
I want to say:
You GoodinsertAfler()
Insert all matching elements after the specified element. In fact, using this method reverses the regular $(A).after(B) operation, that is, instead of inserting B after A, A is inserted after B:
HTML code:
I want to say:
I want to say:
You Goodbefore()
Insert content before each matching element:
HTML code:
I want to say:
I want to say ：
insertBefore()
Push all matching elements in front of the specified element. In fact, using this method reverses the regular $(A).before(B) operation, that is, instead of inserting B before A, insert A before B:
HTML code:
I want to say:
I want to say ：
这些插入节点的方法不仅能将新创建的DOM元素插入到文档中，也能对原有的DOM元素进行移动。例如利用它们创建新元素并对其进行插入操作：
$(function(){
var $li_1 = $("<li title='新增节点：数据结构'>新增节点：数据结构</li>"); // 创建第一个<li>元素
var $li_2 = $("<li title='新增节点：设计模式'>新增节点：设计模式</li>"); // 创建第二个<li>元素
var $li_3 = $("<li title='新增节点：计算机算法'>新增节点：计算机算法</li>"); // 创建第三个<li>元素
var $parent = $(".nm_ul"); // 获取<ul>节点。<li>的父节点
var $two_li = $(".nm_ul li:eq(1)"); // 获取<ul>节点中第二个<li>元素节点
$("#btn_1").click(function(){
$parent.append($li_1); // 添加到<ul>节点中，使之能在网页中显示
});
$("#btn_2").click(function(){
// 可以采取链式写法：$parent.append($li_1).append($li_2);
$parent.append($li_2);
});
$("#btn_3").click(function(){
// insertAfter方法将创建的第三个<li>元素元素插入到获取的<li>之后
$li_3.insertAfter($two_li);
});
});也利用它们对原有的DOM元素进行移动：
$(function(){
var $one_li = $("ul li:eq(1)"); // 获取<ul>节点中第二个<li>元素节点
var $two_li = $("ul li:eq(2)"); // 获取<ul>节点中第三个<li>元素节点
$two_li.insertBefore($one_li); //移动节点
});
希望本文所述对大家的jQuery程序设计有所帮助。
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