详解html5页面 rem 布局适配方法Html5移动端网页端适配(js+rem)html5中JavaScript removeChild 删除所有节点HTML5中 rem适配方案与 viewport 适配问题详解

 !(function(win, doc){ function setFontSize() { // 获取window 宽度 // zepto实现 $(window).width()就是这么干的 var winWidth = window.innerWidth; // doc.documentElement.style.fontSize = (winWidth / 640) * 100 + 'px' ; // 640宽度以上进行限制 需要css进行配合 var size = (winWidth / 640) * 100; doc.documentElement.style.fontSize = (size < 100 ? size : 100) + 'px' ; } var evt = 'onorientationchange' in win ? 'orientationchange' : 'resize'; var timer = null; win.addEventListener(evt, function () { clearTimeout(timer); timer = setTimeout(setFontSize, 300); }, false); win.addEventListener("pageshow", function(e) { if (e.persisted) { clearTimeout(timer); timer = setTimeout(setFontSize, 300); } }, false); // 初始化 setFontSize(); }(window, document)); 

 (function(WIN) { var setFontSize = WIN.setFontSize = function (_width) { var docEl = document.documentElement; // 获取当前窗口的宽度 var width = _width || docEl.clientWidth; // docEl.getBoundingClientRect().width; // 大于 1080px 按 1080 if (width > 1080) { width = 1080; } var rem = width / 10; console.log(rem); docEl.style.fontSize = rem + 'px'; // 误差、兼容性处理 var actualSize = win.getComputedStyle && parseFloat(win.getComputedStyle(docEl)["font-size"]); if (actualSize !== rem && actualSize > 0 && Math.abs(actualSize - rem) > 1) { var remScaled = rem * rem / actualSize; docEl.style.fontSize = remScaled + 'px'; } } var timer; function dbcRefresh() { clearTimeout(timer); timer = setTimeout(setFontSize, 100); } //窗口更新动态改变 font-size WIN.addEventListener('resize', dbcRefresh, false); //页面显示时计算一次 WIN.addEventListener('pageshow', function(e) { if (e.persisted) { dbcRefresh() } }, false); setFontSize(); })(window) //对H5活动推过页面，宽高比例有所要求，可适当调整 function adjustWarp(warpId = '#warp') { const $win = $(window); const height = $win.height(); let width = $win.width(); // 考虑导航栏情况 if (width / height < 360 / 600) { return; } width = Math.ceil(height * 360 / 640); $(warpId).css({ height, width, postion: 'relative', top: 0, left: 'auto', margin: '0 auto' }); // 重新计算 rem window.setFontSize(width); } 

 @media screen and ( min-width: 320px){html{font-size:50px}} @media screen and ( min-width: 360px){html{font-size:56.25px}} @media screen and ( min-width: 375px){html{font-size:58.59375px}} @media screen and ( min-width: 384px){html{font-size:60px}} @media screen and ( min-width: 400px){html{font-size:62.5px}} @media screen and ( min-width: 414px){html{font-size:64.6875px}} @media screen and ( min-width: 424px){html{font-size:66.25px}} @media screen and ( min-width: 480px){html{font-size:75px}} @media screen and ( min-width: 540px){html{font-size:84.375px}} @media screen and ( min-width: 640px){html{font-size:100px}}