<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JsDOM对象</title>
<script type="text/javascript" src="tzy.js"></script>
</head>
<body>
<p name = "pn">hello</p>
<p name = "pn">hello</p>
<p name = "pn">hello</p>
<p name = "pn">hello</p>
<a id = "aid" title = "title属性"></a>
<ul><li id="li1">1</li><li>2 3</li><li>3</li></ul>
<div id="div">
<p id="pid">我是p节点</p>
<p id="pid1">我是p1节点</p>
</div>
<script>
function getName() {
var count = document.getElementsByName("pn");//根据name获取
alert("count长度"+count.length);//看是否获取到
var p = count[2];
p.innerHTML = "world";
var count1 = document.getElementsByTagName("p");//根据标签名获取
alert("count1长度"+count1.length);
var p1 = count1[3];
p1.innerHTML = "hahaha";
}
getName();
function getSetAttr() {
var a = document.getElementById("aid");//根据id获取
var attr = a.getAttribute("title");//获取当前元素某个属性值
alert(attr);
a.setAttribute("id","动态被设置为id")//设置当前元素某个属性值
var attr1 =a.getAttribute("id");
alert(attr1);
}
getSetAttr();
function getChildNode(){
var childnode = document.getElementsByTagName("ul")[0].childNodes;//获取子节点项，注意ul里面空格也会算子节点，所以要去掉空格
alert("ul的字节点数"+childnode.length);
alert("ul里的第一个子节点类型"+childnode[0].nodeType);//有疑问
alert("ul里的第二个子节点类型"+childnode[1].nodeType);
}
getChildNode();
function getParentNode() {
var li1 = document.getElementById("li1");
alert("li1的父节点"+li1.parentNode.nodeName);//获取父节点及名字
}
getParentNode();
function createNode(){
var body = document.body;//获取body
var input = document.createElement("input");//创建节点
input.type = "button";
input.value = "自建按钮";
body.appendChild(input);//将节点添加到body中
//createTextNode()添加文本节点
}
createNode();
function addNode() {
var div = document.getElementById("div");
var node = document.getElementById("pid");
var newnode = document.createElement("p");
newnode.innerHTML = "这是我添加的p节点";
div.insertBefore(newnode,node);//添加节点到某个节点前
}
addNode();
function removeNode() {
var div = document.getElementById("div");
var p = div.removeChild(div.childNodes[2]);//删除p节点因为空格算一个节点
}
removeNode();
function getSize(){
//offsetheight 网页尺寸（不包含滚动条）
//scrollheight 网页尺寸（包含滚动条）
var height = document.body.offsetHeight||document.documentElement.offsetHeight;//兼容性写法
var width = document.body.offsetWidth;
alert("宽度"+width+"高度"+height);
}
getSize();
</script>
</body>
</html>
时间： 2024-10-17 20:43:53