dom绑定事件操作
s7.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<style>
#test{
background-color: red;
width:300px;
height:400px;
}
</style>
<body>
<div id="test">
sdsd
</div>
<script>
var mydiv=document.getElementById('test');
mydiv.onclick=function () {
console.log('wwwwwwwwwwwwww')
}
</script>
</body>
</html>
行为 样式相分离
S8.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<input type="button" onclick="AddEle1();" value="+">
<input type="button" onclick="AddEle2();" value="+">
<div id="i1">
<p><input type="text"></p>
<!--<hr/> 分隔线标签-->
</div>
<script>
function AddEle1() {
//创建一个标签
//将标签添加到i1里面
var tag="<p><input type='text'/></p>";
//注意：第一个参数只能是'beforeBegin'、 'afterBegin'、 'beforeEnd'、 'afterEnd'
document.getElementById('i1').insertAdjacentHTML("afterEnd",tag);
}
function AddEle2() {
//创建一个标签
//将标签添加到i1里面
var tag=document.createElement('input'); //创建一个input标签
tag.setAttribute('type','text')
tag.style.fontSize="16px";
tag.style.color='red';
var p=document.createElement('p'); //创建p标签
p.appendChild(tag)
document.getElementById('i1').appendChild(p) //添加p标签
}
</script>
</body>
</html>
</body>
</html>
S9.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form id='f1' action="http://www.baidu.com">
<input type="text">
<input type="submit" value="提交">
<a onclick="submitForm();">提交1</a>
</form>
<script>
function submitForm() {
document.getElementById('f1').submit();
alert(123);
var v=confirm('确定?');
console.log(v)
}
var obj=setInterval(function(){
console.log(1);
},1000)
clearInterval(obj);
</script>
</body>
</html>
提交表单
任何标签通过DOM都可以提交表单
document.getElementById('f1').submit();
alert(); 弹窗
confirm('确定?') 确认框 确认为true 取消为false
console.log(v) console口打印
location.href 获取当前url
location.href="http://www.baidu.com" 设置当前url 用于做重定向 跳转
location.href=location.href 刷新
location.reload(); 刷新
var obj=setInterval(function(){},5000) 定时器 5000毫秒执行一次函数
clearInterval(obj);清除定时器
setTimeout 定时器只执行一次
obj= setTimeout(function (){},5000)
清除定时器
claerTimeout(obj);
S10.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<div id="status"></div>
<input type="button" value="删除" onclick="deleteEle(); "/>
<script>
function deleteEle() {
document.getElementById('status').innerText="已经删除";
obj= setTimeout(function () {
document.getElementById('status').innerText='';
},5000)
clearTimeout(obj)
}
</script>
</body>
</html>
document.getElementById('status').innerText="已经删除"; 重新添加标签内容
S11.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<table border="1" width="300px">
<tr onmouseover="t1(0);" onmouseout="t2(0);"><td>1</td><td>2</td><td>2</td></tr>
<tr onmouseover="t1(1);" onmouseout="t2(1);"><td>1</td><td>2</td><td>2</td></tr>
<tr onmouseover="t1(2);" onmouseout="t2(2);"><td>1</td><td>2</td><td>2</td></tr>
</table>
<script>
function t1(n) {
var mytrs=document.getElementsByTagName('tr')[n];
mytrs.style.backgroundColor='red';
}
function t2(n) {
var mytrs=document.getElementsByTagName('tr')[n];
mytrs.style.backgroundColor='';
}
</script>
</body>
</html>
dom0的方式
绑定事件的两种方式:
a.直接标签绑定 onclick='' onfocus=''
b.先获取dom对象，然后进行绑定
document.getElementById('xx').onclick
document.getElementById('xx').onfocus
this 当前触发事件的标签
a.第一种绑定方式
<input id="i1" type="button" onclick="clickon(this)">
function clickon(self){
//self 代指当前点击的标签
}
b.第二种绑定方式
<input id="i1" type="button" >
document.getElementById('xxx').onclick=function(){
//this 代指当前点击的标签
}
c.第三种绑定方式
var mycontent=document.getElementById('i1');
mymain.addEventListener('click',function(){console.log('aaaaa')},false);
mymain.addEventListener('click',function(){console.log('bbbbb')},false);
作用域示例
var mytrs=document.getElementsByTagName('tr');
var len=mytrs.length;
for(var i=0;i<len;i++){
mytrs[i].onmouseover=function () {
this.style.backgroundColor="red";
}
mytrs[i].onmouseout=function () {
this.style.backgroundColor="";
}
S12.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<table border="1" width="300px">
<tr><td>1</td><td>2</td><td>2</td></tr>
<tr><td>1</td><td>2</td><td>2</td></tr>
<tr><td>1</td><td>2</td><td>2</td></tr>
</table>
<script>
var mytrs=document.getElementsByTagName('tr');
var len=mytrs.length;
for(var i=0;i<len;i++){
mytrs[i].onmouseover=function () {
this.style.backgroundColor="red";
}
mytrs[i].onmouseout=function () {
this.style.backgroundColor="";
}
}
</script>
</body>
</html>
dom1的方式
this 光标指向那个tr就指向那个tr
S12-1.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<style>
.hide{
display: none;
}
.item .header{
height: 35px;
background-color: #2459a2;
color: white;
line-height: 35px;
}
</style>
</head>
<body>
<div style="height: 48px;"></div>
<div style="width: 300px;">
<div class="item">
<div class="header" onclick="ChangeMenu(this);">菜单1</div>
<div class="content">
<div>内容1</div>
<div>内容1</div>
<div>内容1</div>
</div>
</div>
<div class="item">
<div class="header" onclick="ChangeMenu(this);">菜单2</div>
<div class="content hide">
<div>内容2</div>
<div>内容2</div>
<div>内容2</div>
</div>
</div>
<div class="item">
<div class="header" onclick="ChangeMenu(this);" >菜单3</div>
<div class="content hide">
<div>内容3</div>
<div>内容3</div>
<div>内容3</div>
</div>
</div>
<div class="item">
<div class="header" onclick="ChangeMenu(this);" >菜单4</div>
<div class="content hide">
<div>内容4</div>
<div>内容4</div>
<div>内容4</div>
</div>
</div>
</div>
<script>
function ChangeMenu(ths) {
var current_header=ths;
var item_list=current_header.parentElement.parentElement.children;
for (var i=0;i<item_list.length;i++){
var current_item=item_list[i];
current_item.children[1].classList.add('hide');
}
current_header.nextElementSibling.classList.remove('hide');
}
</script>
</body>
</html></title>
</head>
<body>
</body>
</html>
S12-2.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<style>
#test{
background-color: red;
width:300px;
height:400px;
}
</style>
<body>
<div id="test">
sdsd
</div>
<script>
var mydiv=document.getElementById('test');
mydiv.addEventListener('click', function(){console.log('aaaaa')},false);
mydiv.addEventListener('click', function(){console.log('bbbbb')},false);
</script>
</body>
</html>
dom2绑定方法
S13.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<style>
#main{
background-color: red;
width: 300px;
height:400px;
}
#content{
background-color: pink;
width: 150px;
height:200px;
}
</style>
<body>
<div id="main">
<div id="content"></div>
</div>
<script>
var mymain=document.getElementById('main');
var mycontent=document.getElementById('content');
mymain.addEventListener('click',function(){console.log('main')},false);
mycontent.addEventListener('click',function(){console.log('content')},false); //冒泡 底下的先出来 true的模式刚好相反
</script>
</body>
</html>
S14.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
function t1(age) { //age 先找到函数声明表达式 function age()
console.log(age); //function age()
var age=27;
console.log(age); //27
function age() {}; //没有调用，通过
console.log(age); // 27 没有改变
}
t1(3);
</script>
</body>
</html>
active object ====>> AO 活动对象
1.形式参数
2.局部变量
3.函数声明表达式
1.形式参数
AO.age=undefined
AO.age=3
2.局部变量
AO.age=undefined
3.函数声明表达式 优先级最高
AO.age=function()
