获取浏览器当前缩放比例

转自：https://blog.csdn.net/ddr66288/article/details/102119975

 

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function detectZoom() {             var ratio = 0,                 screen = window.screen,                 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);             }               alert(ratio); }; <br>detectZoom();