(function(win,lib){var doc=win.document;var docEl=doc.documentElement;var metaEl=doc.querySelector('meta[name="viewport"]');var flexibleEl=doc.querySelector('meta[name="flexible"]');var dpr=0;var scale=0;var tid;var flexible=lib.flexible||(lib.flexible={});if(metaEl){console.warn("将根据已有的meta标签来设置缩放比例");var match=metaEl.getAttribute("content").match(/initial\-scale=([\d\.]+)/);if(match){scale=parseFloat(match[1]);dpr=parseInt(1/scale);}}else{if(flexibleEl){var content=flexibleEl.getAttribute("content");if(content){var initialDpr=content.match(/initial\-dpr=([\d\.]+)/);var maximumDpr=content.match(/maximum\-dpr=([\d\.]+)/);if(initialDpr){dpr=parseFloat(initialDpr[1]);scale=parseFloat((1/dpr).toFixed(2));}if(maximumDpr){dpr=parseFloat(maximumDpr[1]);scale=parseFloat((1/dpr).toFixed(2));}}}}if(!dpr&&!scale){var isAndroid=win.navigator.appVersion.match(/android/gi);var isIPhone=win.navigator.appVersion.match(/iphone/gi);var devicePixelRatio=win.devicePixelRatio;if(isIPhone){if(devicePixelRatio>=3&&(!dpr||dpr>=3)){dpr=3;}else{if(devicePixelRatio>=2&&(!dpr||dpr>=2)){dpr=2;}else{dpr=1;}}}else{dpr=1;}scale=1/dpr;}docEl.setAttribute("data-dpr",dpr);if(!metaEl){metaEl=doc.createElement("meta");metaEl.setAttribute("name","viewport");metaEl.setAttribute("content","initial-scale="+scale+", maximum-scale="+scale+", minimum-scale="+scale+", user-scalable=no");if(docEl.firstElementChild){docEl.firstElementChild.appendChild(metaEl);}else{var wrap=doc.createElement("div");wrap.appendChild(metaEl);doc.write(wrap.innerHTML);}}function refreshRem(){var width=docEl.getBoundingClientRect().width;if(width/dpr>750){width=750*dpr;}var rem=width/10;docEl.style.fontSize=rem+"px";flexible.rem=win.rem=rem;}win.addEventListener("resize",function(){clearTimeout(tid);tid=setTimeout(refreshRem,300);},false);win.addEventListener("pageshow",function(e){if(e.persisted){clearTimeout(tid);tid=setTimeout(refreshRem,300);}},false);if(doc.readyState==="complete"){doc.body.style.fontSize=12*dpr+"px";}else{doc.addEventListener("DOMContentLoaded",function(e){doc.body.style.fontSize=12*dpr+"px";},false);}refreshRem();flexible.dpr=win.dpr=dpr;flexible.refreshRem=refreshRem;flexible.rem2px=function(d){var val=parseFloat(d)*this.rem;if(typeof d==="string"&&d.match(/rem$/)){val+="px";}return val;};flexible.px2rem=function(d){var val=parseFloat(d)/this.rem;if(typeof d==="string"&&d.match(/px$/)){val+="rem";}return val;};})(window,window.lib||(window.lib={}));