88 lines
2.3 KiB
JavaScript
88 lines
2.3 KiB
JavaScript
import { getUniversalZoomLevel } from '@/utils/util'
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import MyEvent from '@/utils/myEvent'
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let flexible = (designWidth, maxWidth, minWidth) => {
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var doc = document,
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win = window,
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docEl = doc.documentElement,
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remStyle = document.createElement('style'),
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tid
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designWidth = designWidth || 1920
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maxWidth = maxWidth || 2560
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minWidth = minWidth || 1024
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let oldDesignWidth = designWidth
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// minWidth = minWidth || 1024;
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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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maxWidth = maxWidth || 1920
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if (width < 1100) {
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document.body.classList.add('ipad')
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} else {
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document.body.classList.remove('ipad')
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}
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if (width > 768) {
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if (width / height > 1.98) width = height * 1.98
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width > maxWidth && (width = maxWidth)
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width < minWidth && (width = minWidth)
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designWidth = oldDesignWidth
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} else {
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designWidth = 393
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}
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console.log(width, designWidth)
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// var rem = width * 10 / designWidth;
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var rem = Math.round((width * 10) / designWidth)
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docEl.style.fontSize = rem + 'px'
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remStyle.innerHTML = 'html{font-size:' + rem + 'px;}'
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MyEvent.emit('remChange', rem)
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}
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// if (docEl.firstElementChild) {
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// docEl.firstElementChild.appendChild(remStyle);
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// } else {
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// var wrap = doc.createElement("div");
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// wrap.appendChild(remStyle);
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// doc.write(wrap.innerHTML);
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// wrap = null;
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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(
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'resize',
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function () {
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clearTimeout(tid) //防止执行两次
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tid = setTimeout(refreshRem, 300)
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},
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false
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)
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win.addEventListener(
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'pageshow',
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function (e) {
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if (e.persisted) {
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// 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, 300)
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}
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},
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false
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)
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if (doc.readyState === 'complete') {
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doc.body.style.fontSize = '16px'
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} else {
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doc.addEventListener(
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'DOMContentLoaded',
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function (e) {
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doc.body.style.fontSize = '16px'
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},
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false
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)
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}
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}
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export default flexible
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