span{
color: white;
padding: 8px;
margin: 5px;
float: left;
}
.green {
background-color: green;
}
.blue {
background-color: blue;
}
<span class="green">green</span>
<span class="blue">blue</span>
<span class="green">333</span>
<span class="blue">444</span>
1. 使用??remove()? ?->? 删除元素及其子元素,标签和内容一起删除
? ?指定元素.remove()
$(".green").remove()
2.??empty()? ?->? 清空元素内容, 保留标签
$(".blue").empty()
span{
color: white;
padding: 8px;
margin: 5px;
float: left;
}
.green {
background-color: green;
}
.blue {
background-color: blue;
}
<h3>遍历元素</h3>
<span class="green">green</span>
<span class="green">blue</span>
<span class="green">333</span>
<span class="green">444</span>
each():
? ?$(selector).each(function(index,element))
? ? ? ?// 参数function为遍历时的回调函数
? ? ? ? // index为遍历元素的序列号,从0开始
? ? ? ? // element是当前的元素,此时是dom元素
// 获取指定元素并遍历
$(".green").each(function(index, element) {
console.log(index)
console.log(element)
})