虚拟DOM的概念
//模拟dom树
var div = {
tagName:'div',
attrs:{
id:'mydiv',
title:"说实话",
'data-index':'0'
},
childrens:[
'我好帅',
{
tagName:'p',
attrs:{},
childrens:[
'哈哈哈哈'
]
}
]
}