hotcss.min.js

/**
* 项目名:hotcss(https://github.com/imochen/hotcss)
* 作者:墨尘(https://github.com/imochen)
* 官网：http://imochen.github.io/hotcss/
*/
(function(window,document){var hotcss={};(function(){var viewportEl=document.querySelector('meta[name="viewport"]'),hotcssEl=document.querySelector('meta[name="hotcss"]'),dpr=window.devicePixelRatio||1,maxWidth=540,designWidth=0;dpr=dpr>=3?3:(dpr>=2?2:1);if(hotcssEl){var hotcssCon=hotcssEl.getAttribute("content");if(hotcssCon){var initialDprMatch=hotcssCon.match(/initial\-dpr=([\d\.]+)/);if(initialDprMatch){dpr=parseFloat(initialDprMatch[1])}var maxWidthMatch=hotcssCon.match(/max\-width=([\d\.]+)/);if(maxWidthMatch){maxWidth=parseFloat(maxWidthMatch[1])}var designWidthMatch=hotcssCon.match(/design\-width=([\d\.]+)/);if(designWidthMatch){designWidth=parseFloat(designWidthMatch[1])}}}document.documentElement.setAttribute("data-dpr",dpr);hotcss.dpr=dpr;document.documentElement.setAttribute("max-width",maxWidth);hotcss.maxWidth=maxWidth;if(designWidth){document.documentElement.setAttribute("design-width",designWidth)}hotcss.designWidth=designWidth;var scale=1/dpr,content="width=device-width, initial-scale="+scale+", minimum-scale="+scale+", maximum-scale="+scale+", user-scalable=no";if(viewportEl){viewportEl.setAttribute("content",content)}else{viewportEl=document.createElement("meta");viewportEl.setAttribute("name","viewport");viewportEl.setAttribute("content",content);document.head.appendChild(viewportEl)}})();hotcss.px2rem=function(px,designWidth){if(!designWidth){designWidth=parseInt(hotcss.designWidth,10)}return parseInt(px,10)*320/designWidth/20};hotcss.rem2px=function(rem,designWidth){if(!designWidth){designWidth=parseInt(hotcss.designWidth,10)}return rem*20*designWidth/320};hotcss.mresize=function(){var innerWidth=document.documentElement.getBoundingClientRect().width||window.innerWidth;if(hotcss.maxWidth&&(innerWidth/hotcss.dpr>hotcss.maxWidth)){innerWidth=hotcss.maxWidth*hotcss.dpr}if(!innerWidth){return false}document.documentElement.style.fontSize=(innerWidth*20/320)+"px";hotcss.callback&&hotcss.callback()};hotcss.mresize();window.addEventListener("resize",function(){clearTimeout(hotcss.tid);hotcss.tid=setTimeout(hotcss.mresize,33)},false);window.addEventListener("load",hotcss.mresize,false);setTimeout(function(){hotcss.mresize()},333);window.hotcss=hotcss})(window,document);