js rem單位適配

<script type="text/javascript">// 設備區分 （安卓、火狐、平板、PC）var os = function() {var ua = navigator.userAgent,isAndroid = /(?:Android)/.test(ua),isFireFox = /(?:Firefox)/.test(ua),isTablet = /(?:iPad|PlayBook)/.test(ua) || (isAndroid && !/(?:Mobile)/.test(ua)) || (isFireFox && /(?:Tablet)/.test(ua)),isPC = !(/Android|webOS|iPhone|iPod|BlackBerry/i.test(ua));return {isTablet: isTablet,};}();(function (window, document) {function resize() {var docEl = document.documentElement;var clientWidth = docEl.clientWidth;var clientHeight = docEl.clientHeight;if (clientWidth < clientHeight) { // 手機豎屏docEl.style.fontSize = clientWidth / 7.5 + "px";} else { // 手機橫屏 docEl.style.fontSize = clientHeight / 7.5 + "px";}if(os.isTablet) { //ipad if(clientWidth >= 1366) {docEl.style.fontSize = clientWidth / 1366 * 100 + "px";} else {docEl.style.fontSize = clientWidth / 1024 * 100 + "px";}}if (os.isPC) { // pcif(clientWidth >= 1920) {docEl.style.fontSize = 1920 / 19.20 + "px";} else {docEl.style.fontSize = clientWidth / 19.20 + "px";}} }resize();// reset rem unit on page resizewindow.addEventListener("resize", function () {resize()});window.addEventListener('pageshow', function (e) {if (e.persisted) {resize()}});}(window, document)); </script>

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