初始化

lib-flexible/base.css

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+html,
+body,
+ul,
+li,
+ol,
+dl,
+dd,
+dt,
+p,
+h1,
+h2,
+h3,
+h4,
+h5,
+h6,
+form,
+fieldset,
+legend,
+img,input{
+    margin: 0;
+    padding: 0;
+}
+
+fieldset,
+img {
+    border: none;
+}
+
+img {
+    display: block;
+}
+
+
+
+ul,
+ol {
+    list-style: none;
+}
+
+body {
+    color: #333;
+    font: 12px/20px "SimSun", "宋体", "Arial Narrow", HELVETICA;
+    background: #fff;
+    /* overflow-y:scroll;*/
+    /* overflow-x: hidden; */
+}
+
+a {
+    color: #666;
+    text-decoration: none;
+}
+
+a:visited {
+    color: #666;
+}
+
+a:hover,
+a:active,
+a:focus {
+    color: #ff8400;
+    text-decoration: underline;
+}

lib-flexible/index.js

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+(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))

lib-flexible/index.min.js

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+!function(e,t){function n(){t.body?t.body.style.fontSize=12*o+"px":t.addEventListener("DOMContentLoaded",n)}function d(){var e=i.clientWidth/10;i.style.fontSize=e+"px"}var i=t.documentElement,o=e.devicePixelRatio||1;if(n(),d(),e.addEventListener("resize",d),e.addEventListener("pageshow",function(e){e.persisted&&d()}),o>=2){var a=t.createElement("body"),s=t.createElement("div");s.style.border=".5px solid transparent",a.appendChild(s),i.appendChild(a),1===s.offsetHeight&&i.classList.add("hairlines"),i.removeChild(a)}}(window,document);

lib-flexible/js/rem.js

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+!function(e){function t(a){if(i[a])return i[a].exports;var n=i[a]={exports:{},id:a,loaded:!1};return e[a].call(n.exports,n,n.exports,t),n.loaded=!0,n.exports}var i={};return t.m=e,t.c=i,t.p="",t(0)}([function(e,t){"use strict";Object.defineProperty(t,"__esModule",{value:!0});var i=window;t["default"]=i.flex=function(normal,e,t){var a=e||100,n=t||1,r=i.document,o=navigator.userAgent,d=o.match(/Android[\S\s]+AppleWebkit\/(\d{3})/i),l=o.match(/U3\/((\d+|\.){5,})/i),c=l&&parseInt(l[1].split(".").join(""),10)>=80,p=navigator.appVersion.match(/(iphone|ipad|ipod)/gi),s=i.devicePixelRatio||1;p||d&&d[1]>534||c||(s=1);var u=normal?1:1/s,m=r.querySelector('meta[name="viewport"]');m||(m=r.createElement("meta"),m.setAttribute("name","viewport"),r.head.appendChild(m)),m.setAttribute("content","width=device-width,user-scalable=no,initial-scale="+u+",maximum-scale="+u+",minimum-scale="+u),r.documentElement.style.fontSize=normal?"50px": a/2*s*n+"px"},e.exports=t["default"]}]); flex(false,100, 1);

lib-flexible/js/rem1.js

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+(function(doc, win) {
+  // html元素字体
+  // 这里基础字体设置为10在uc, WX上没效果,  不知道为什么
+  // 设置为10时, dpr=1的手机, 宽度360, 计算出来html的字体大小为5px, 可能是字体太小了
+  // 尽量设置大一些, 这样避免12px字体大小的限制
+  var _rootFontSize = window._rootFontSize || 100;
+
+  // 默认不支持缩放
+  var _remMetaScalable = typeof window._remMetaScalable === 'undefined' 
+    ? false 
+    : !!window._remMetaScalable;
+
+  var docEl = doc.documentElement,
+    isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
+
+    // 只针对IOS设备
+    // dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1,
+    dpr = 1,
+    // 计算缩放比
+    scale = 1 / dpr,
+
+    // 检测支持的"缩放"事件
+    resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';
+  docEl.dataset.dpr = dpr;
+
+  // 被iframe引用时，禁止缩放
+  dpr = window.top === window.self ? dpr : 1;
+
+  var metaEl = doc.createElement('meta');
+  metaEl.name = 'viewport';
+  var metaElContent = 'width=device-width, ';
+
+  // 支持缩放
+  if (_remMetaScalable) {
+    metaElContent += 'initial-scale=' + scale;
+  } else {
+    metaElContent += (
+      'initial-scale=' + scale 
+      + ',maximum-scale=' + scale 
+      + ', minimum-scale=' + scale 
+      + ', user-scalable=no');
+  }
+  metaEl.content = metaElContent;
+  docEl.firstElementChild.appendChild(metaEl);
+
+  // 缩放/旋转设备检测函数
+  var recalc = function() {
+    var width = docEl.clientWidth;
+
+    // 750为设计用的宽度, 比如它以iphone6标准(宽750)
+    // 此时, 按照设计稿的尺寸写就可以了
+    // 如: 设计稿为100px, 那么就写4rem(100 / 25), 25是自己设置的
+    // 也可以设置成100, 这样就写100px就写1rem
+    docEl.style.fontSize = _rootFontSize * (width / 375) + 'px';
+  };
+  recalc();
+
+  if (!doc.addEventListener) return;
+  win.addEventListener(resizeEvt, recalc, false);
+  doc.getElementsByTagName('body')[0].style.fontSize = '16px'
+})(document, window);