想做一个屏幕尺寸为1920的适配 但设置尺寸200 px 自动转换成2.5rem 但在浏览器上并不是200px 这是什么地方出问题了
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<script src="../js/flexible.js"></script>
<style>
@media screen and(max-width:1024px) {
html {
font-size: 42.66px !important;
}
}
@media screen and(min-width:1920px) {
html {
font-size: 80px !important;
}
}
.box1 {
width: 2.5rem;
height: 2.5rem;
background-color: pink;
}
.box2 {
width: 200px;
height: 200px;
background-color: plum;
}
</style>
</head>
<body>
<div class="box1"></div>
<div class="box2"></div>
</body>
</html>
//flxible.js
(function flexible(window, document) {
var docEl = document.documentElement
var dpr = window.devicePixelRatio || 1
// adjust body font size
function setBodyFontSize() {
if (document.body) {
document.body.style.fontSize = (12 * dpr) + 'px'
} else {
document.addEventListener('DOMContentLoaded', setBodyFontSize)
}
}
setBodyFontSize();
// set 1rem = viewWidth / 10
function setRemUnit() {
var rem = docEl.clientWidth / 24
docEl.style.fontSize = rem + 'px'
}
setRemUnit()
// reset rem unit on page resize
window.addEventListener('resize', setRemUnit)
window.addEventListener('pageshow', function(e) {
if (e.persisted) {
setRemUnit()
}
})
// detect 0.5px supports
if (dpr >= 2) {
var fakeBody = document.createElement('body')
var testElement = document.createElement('div')
testElement.style.border = '.5px solid transparent'
fakeBody.appendChild(testElement)
docEl.appendChild(fakeBody)
if (testElement.offsetHeight === 1) {
docEl.classList.add('hairlines')
}
docEl.removeChild(fakeBody)
}
}(window, document))
