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)}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,dfn,em,var{font-style:normal;font-weight:500}ol,ul{list-style:none}caption,th{text-align:left}h1,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}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 > 750 && (b = 750 * 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("警告");
        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),300))
    },"complete" === e.readyState ? e.body.style.fontSize = 12 * i + "px": e.addEventListener("DOMContentLoaded",function() {
        e.body.style.fontSize = 12 * i + "px"
    },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 = {}));