移动端rem适配js
// 默认375，750设计稿请将375替换为750
(function (doc, win) {
// 移动端适配
var docEl = doc.documentElement,
isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1,
dpr = window.top === window.self ? dpr : 1, //被iframe引用时，禁止缩放
dpr = 1,
scale = 1 / dpr,
resizeEvt = "orientationchange" in window ? "orientationchange" : "resize";
docEl.dataset.dpr = dpr;
var metaEl = doc.createElement("meta");
metaEl.name = "viewport";
metaEl.content = "initial-scale=" + scale + ",maximum-scale=" + scale + ", minimum-scale=" + scale;
docEl.firstElementChild.appendChild(metaEl);
var recalc = function () {
var width = docEl.clientWidth;
if (width / dpr > 375) {
width = 375 * dpr;
}
// 乘以100，px : rem = 100 : 1
docEl.style.fontSize = 100 * (width / 375) + "px";
};
recalc();
if (!doc.addEventListener) return;
win.addEventListener(resizeEvt, recalc, false);
})(document, window);
html兼容样式
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge" />
<meta name="viewport" content="width=device-width,initial-scale=1.0,maximum-scale=1.0,minimum-scale=1.0,minimal-ui,viewport-fit=cover" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="apple-mobile-web-app-status-bar-style" content="black" />
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="format-detection" content="telephone=no" />
<meta name="apple-touch-fullscreen" content="yes" />
<meta name="format-detection" content="email=no" />
<meta name="screen-orientation" content="portrait" />
<meta name="x5-orientation" content="portrait" />
<meta name="x5-fullscreen" content="true" />
<meta name="full-screen" content="yes" />
<meta name="renderer" content="webkit" />
<title>Title</title>
</head>
<body>
<div id="app"></div>
</body>
</html>
CSS样式
建议在 body 中设置全局默认字体大小