rem:目前多数企业再用的解决方案(如小米官网) vw/vh:未来的解决方案(如bilibili)长度单位
rem适配——媒体查询rem基本使用
px单位换算成rem单位 html代码:rem适配
css代码:rem开发流程
@media (width: 320px) {
html {
font-size: 32px;
}
}
@media (width: 375px) {
html {
font-size: 37.5px;
}
}
@media (width: 414px) {
html {
font-size: 41.4px;
}
}
.box {
width: 1.81333rem;
height: 0.77333rem;
background-color: pink;
}
flexible.js基本使用
css代码:rem开发流程
.box {
width: 1.81333rem;
height: 0.77333rem;
background-color: pink;
}
js代码:将其命名为flexible.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 / 10
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))```



