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40 lines
1.3 KiB
40 lines
1.3 KiB
(function (doc, win) {
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var docEl = doc.documentElement,
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isIOS = navigator.userAgent.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/),
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dpr = isIOS ? Math.min(win.devicePixelRatio, 3) : 1,
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dpr = window.top === window.self ? dpr : 1, //被iframe引用时，禁止缩放
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dpr = 1,
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scale = 1 / dpr,
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resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize';
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docEl.dataset.dpr = dpr;
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var metaEl = doc.createElement('meta');
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metaEl.name = 'viewport';
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metaEl.content = 'initial-scale=' + scale + ',maximum-scale=' + scale + ', minimum-scale=' + scale;
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docEl.firstElementChild.appendChild(metaEl);
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var recalc = function () {
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var width = docEl.clientWidth;
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if (width / dpr > 750) {
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width = 750 * dpr;
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}
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// 乘以100，px : rem = 100 : 1
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docEl.style.fontSize = 100 * (width / 750) + 'px';
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};
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recalc()
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if (!doc.addEventListener) return;
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win.addEventListener(resizeEvt, recalc, false);
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})(document, window);
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const isIPhoneX = () => {
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let u = navigator.userAgent;
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let isIOS = !!u.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/);
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if (isIOS) {
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if (screen.height == 812 && screen.width == 375) {
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return true;
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}
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else {
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return false;
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}
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}
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}
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