<!DOCTYPE?html>
<html?lang='zh-cn'>
????<head>?
??????<title>菜單</title>???
??????<meta?charset='utf-8'>?
??????<style?type='text/css'>
?????????*{?
??????????margin:?0;
??????????padding:?0;?
????????}???????????
?????????.page{?????????????
???????????width:?100%;????????
???????????height:?100%;?????????????
???????????background:?url(imooc.jpeg)?center?top?no-repeat;??????
????????}?
??????</style>????
??????</head>????
??????<body>???????
??????????<div?class="page"></div>??????????
?????</body>
?????</html>
2020-12-24
html,body{ ????width:?100%; ????height:?100%; }這樣就可以了
2020-11-20
page設置height:?100%;? ? ? ? 實際高度為0，它的父元素是body，默認高度就是0px。設置一個固定高度或者里面放個能撐起高度的子元素就能顯示出來了