最新黑馬java十次方社交專案教程
阿新 • • 發佈：2018-12-21
使用js+viewport動態設定手動適配rem
我的編輯器是vscode,添加了外掛cssrem自動轉換
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<!-- <meta name="viewport" content="width=device-width,initial-scale=1.0"> -->
<meta name="viewport" content="width=device-width,initial-scale=1.0,minimum-scale=1.0,maximum-scale=1.0,user-scalable=no" />
<!-- 啟用360瀏覽器的極速模式(webkit) -->
<meta name="renderer" content="webkit">
<!-- 避免IE使用相容模式 -->
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<!-- 針對手持裝置優化，主要是針對一些老的不識別viewport的瀏覽器，比如黑莓 -->
<meta name="HandheldFriendly" content="true">
<!-- 微軟的老式瀏覽器 -->
<meta name="MobileOptimized" content="320">
<!-- uc強制豎屏 -->
<meta name="screen-orientation" content="portrait">
<!-- QQ強制豎屏 -->
<meta name="x5-orientation" content="portrait">
<!-- UC強制全屏 -->
<meta name="full-screen" content="yes">
<!-- QQ強制全屏 -->
<meta name="x5-fullscreen" content="true">
<!-- UC應用模式 -->
<meta name="browsermode" content="application">
<!-- QQ應用模式 -->
<meta name="x5-page-mode" content="app">
<!-- windows phone 點選無高光 -->
<meta name="msapplication-tap-highlight" content="no">
<meta content="telephone=no" name="format-detection" />
<meta name="huaban" content="nopin" />
<link rel="icon" type="image/x-icon" href="/favicon.ico">
<title>新茶飲</title>
<script src="/config.js"></script>
<script src="http://res.wx.qq.com/open/js/jweixin-1.0.0.js"></script>
</head>
<body>
<div id="app"></div>
<!--
在iphone 5 中1rem=16px;
html font-size =16px=1rem;
-->
<script>
//得到手機螢幕的寬度
let htmlWidth = document.documentElement.clientWidth || document.body.clientWidth;
console.log('htmlWidth',htmlWidth)
//得到html的Dom元素
let htmlDom = document.getElementsByTagName('html')[0];
// if(htmlWidth>640){//超過640大小的，字型根部都是16px
// htmlWidth=640;
// console.log('htmlWidth-true',htmlWidth)
// }
//設定根元素字型大小
htmlDom.style.fontSize = htmlWidth / 40 + 'px';
</script>
</body>
</html>
根據css的媒體查詢動態設定根部html字型大小
html {font-size: 625%; /*100 ÷ 16 × 100% = 625%*/}
@media screen and (min-width:360px) and (max-width:374px) and (orientation:portrait) {
html { font-size: 703%; }
}
@media screen and (min-width:375px) and (max-width:383px) and (orientation:portrait) {
html { font-size: 732.4%; }
}
@media screen and (min-width:384px) and (max-width:399px) and (orientation:portrait) {
html { font-size: 750%; }
}
@media screen and (min-width:400px) and (max-width:413px) and (orientation:portrait) {
html { font-size: 781.25%; }
}
@media screen and (min-width:414px) and (max-width:431px) and (orientation:portrait){
html { font-size: 808.6%; }
}
@media screen and (min-width:432px) and (max-width:479px) and (orientation:portrait){
html { font-size: 843.75%; }
}