注：如果高度也缩放会导致大屏项目中图片拉伸的问题，所以本方法不包含高度缩放
const functionOne = (function (win) {
var bodyStyle = document.createElement('style')
bodyStyle.innerHTML = `body{width:1920px; height:1080px!important;}`
document.documentElement.firstElementChild.appendChild(bodyStyle)
function refreshScale() {
let docWidth = document.documentElement.clientWidth;
let docHeight = document.documentElement.clientHeight;
var designWidth = 1920,
designHeight = 1080,
widthRatio = docWidth / designWidth,
heightRatio = docHeight / designHeight; // 缩放比例
document.body.style = `transform:scale(${widthRatio});transform-origin:left top;`;
// 应对浏览器 全屏切换前后 窗口因短暂滚动条问题出现未占满情况
setTimeout(function () {
var lateWidth = document.documentElement.clientWidth,
lateHeight = document.documentElement.clientHeight;
if (lateWidth === docWidth) return;
widthRatio = lateWidth / designWidth
heightRatio = lateHeight / designHeight
document.body.style = "transform:scale(" + widthRatio + ");transform-origin:left top;"
}, 0)
}
refreshScale()
win.addEventListener("pageshow", function (e) {
if (e.persisted) { // 浏览器后退的时候重新计算
refreshScale()
}
}, false);
win.addEventListener("resize", refreshScale, false);
})(window)
export { functionOne }