flexible less 使用 | 易学教程

html

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>test</title>
    <script src="lib/flexible_css.js,flexible.js"></script>
    <link rel="stylesheet" href="css/css.css">
</head>
<body>
    

<div class="a">
    
</div>
<div class="b">
    
</div>

</body>
</html>

less(vscode使用easy less转换)

// 设计稿宽度 单位px 如果是750 请使用375宽度的手机开发
@DesignWidth : 750; 
@BaseFontSize: @DesignWidth/10;

// 函数式
// .rem(width,100);
.rem(@name, @px) {
    @{name}: unit(@px / @BaseFontSize, rem);
}

// 变量式
// height: 100/@r;
@r       : @BaseFontSize * 1rem;

.a {
    font-size : @BaseFontSize;
    background: red;
    width: 375/@r;
    height: 375/@r;
}
.b{
    width: 50%;
    padding: 25% 0;
    background: greenyellow;
}
*{
    margin: 0;
    padding: 0;
}

flexible_css.js,flexible.js

!function(){var a="@charset \"utf-8\";html{color:#000;background:#fff;overflow-y:scroll;-webkit-text-size-adjust:100%;-ms-text-size-adjust:100%}html *{outline:0;-webkit-text-size-adjust:none;-webkit-tap-highlight-color:rgba(0,0,0,0)}html,body{font-family:sans-serif}body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,code,form,fieldset,legend,input,textarea,p,blockquote,th,td,hr,button,article,aside,details,figcaption,figure,footer,header,hgroup,menu,nav,section{margin:0;padding:0}input,select,textarea{font-size:100%}table{border-collapse:collapse;border-spacing:0}fieldset,img{border:0}abbr,acronym{border:0;font-variant:normal}del{text-decoration:line-through}address,caption,cite,code,dfn,em,th,var{font-style:normal;font-weight:500}ol,ul{list-style:none}caption,th{text-align:left}h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:500}q:before,q:after{content:''}sub,sup{font-size:75%;line-height:0;position:relative;vertical-align:baseline}sup{top:-.5em}sub{bottom:-.25em}a:hover{text-decoration:underline}ins,a{text-decoration:none}",b=document.createElement("style");if(document.getElementsByTagName("head")[0].appendChild(b),b.styleSheet)b.styleSheet.disabled||(b.styleSheet.cssText=a);else try{b.innerHTML=a}catch(c){b.innerText=a}}();!function(a,b){function c(){var b=f.getBoundingClientRect().width;b/i>540&&(b=540*i);var c=b/10;f.style.fontSize=c+"px",k.rem=a.rem=c}var d,e=a.document,f=e.documentElement,g=e.querySelector('meta[name="viewport"]'),h=e.querySelector('meta[name="flexible"]'),i=0,j=0,k=b.flexible||(b.flexible={});if(g){console.warn("将根据已有的meta标签来设置缩放比例");var l=g.getAttribute("content").match(/initial\-scale=([\d\.]+)/);l&&(j=parseFloat(l[1]),i=parseInt(1/j))}else if(h){var m=h.getAttribute("content");if(m){var n=m.match(/initial\-dpr=([\d\.]+)/),o=m.match(/maximum\-dpr=([\d\.]+)/);n&&(i=parseFloat(n[1]),j=parseFloat((1/i).toFixed(2))),o&&(i=parseFloat(o[1]),j=parseFloat((1/i).toFixed(2)))}}if(!i&&!j){var p=(a.navigator.appVersion.match(/android/gi),a.navigator.appVersion.match(/iphone/gi)),q=a.devicePixelRatio;i=p?q>=3&&(!i||i>=3)?3:q>=2&&(!i||i>=2)?2:1:1,j=1/i}if(f.setAttribute("data-dpr",i),!g)if(g=e.createElement("meta"),g.setAttribute("name","viewport"),g.setAttribute("content","initial-scale="+j+", maximum-scale="+j+", minimum-scale="+j+", user-scalable=no"),f.firstElementChild)f.firstElementChild.appendChild(g);else{var r=e.createElement("div");r.appendChild(g),e.write(r.innerHTML)}a.addEventListener("resize",function(){clearTimeout(d),d=setTimeout(c,300)},!1),a.addEventListener("pageshow",function(a){a.persisted&&(clearTimeout(d),d=setTimeout(c,300))},!1),"complete"===e.readyState?e.body.style.fontSize=12*i+"px":e.addEventListener("DOMContentLoaded",function(){e.body.style.fontSize=12*i+"px"},!1),c(),k.dpr=a.dpr=i,k.refreshRem=c,k.rem2px=function(a){var b=parseFloat(a)*this.rem;return"string"==typeof a&&a.match(/rem$/)&&(b+="px"),b},k.px2rem=function(a){var b=parseFloat(a)/this.rem;return"string"==typeof a&&a.match(/px$/)&&(b+="rem"),b}}(window,window.lib||(window.lib={}));

在这里插入图片描述

来源：https://blog.csdn.net/weixin_43515759/article/details/101349757

标签

flexible

less