屏幕缩放比例

// 窗口像素比
链接文章
detectZoom() {
let ratio = 0
let screen = window.screen
let ua = navigator.userAgent.toLowerCase()
if (window.devicePixelRatio !== undefined) {
ratio = window.devicePixelRatio
} else if (~ua.indexOf(‘msie’)) {
if (screen.deviceXDPI && screen.logicalXDPI) {
ratio = screen.deviceXDPI / screen.logicalXDPI
}
} else if (window.outerWidth !== undefined && window.innerWidth !== undefined) {
ratio = window.outerWidth / window.innerWidth
}
if (ratio) {
ratio = Math.round(ratio * 100)
}
return ratio
}
window.devicePixelRatio

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