38 lines
1.3 KiB
JavaScript
38 lines
1.3 KiB
JavaScript
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import { getUniversalZoomLevel } from '@/utils/tools'
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const maxWidth = 1920;
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const minWidth = 500;
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const maxHeight = 1080;
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const minHeight = 500;
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let flexible = (designWidth = 1920, designHeight = 1080) => {
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var doc = document, win = window, docEl = doc.documentElement, remStyle = document.createElement("style"), tid;
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function refreshRem() {
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var width = docEl.getBoundingClientRect().width;
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var height = docEl.getBoundingClientRect().height;
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width = getUniversalZoomLevel() * width
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height = getUniversalZoomLevel() * height
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if (width > maxWidth) width = maxWidth;
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if (width < minWidth) width = minWidth;
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if (height > maxHeight) height = maxHeight;
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if (height < minHeight) height = minHeight;
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const wrem = (width * 10 / designWidth).toFixed(2);
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const hrem = (height * 10 / designHeight).toFixed(2);
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const rem = Math.min(wrem, hrem);
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docEl.style.fontSize = rem + 'px'
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}
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//要等 wiewport 设置好后才能执行 refreshRem，不然 refreshRem 会执行2次；
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refreshRem();
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win.addEventListener("resize", function () {
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clearTimeout(tid); //防止执行两次
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tid = setTimeout(refreshRem, 200);
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}, false);
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win.addEventListener("pageshow", function (e) {
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if (e.persisted) { // 浏览器后退的时候重新计算
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clearTimeout(tid);
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tid = setTimeout(refreshRem, 200);
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}
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}, false);
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};
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export default flexible
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