JS不能调整浏览器的显示比例，仅能查看
//调整浏览器显示比例【仅能查看】function ChangeRatio(){var ratio=0;var screen=window.screen;var 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;}
css 判断
@media screen and (resolution: 1.25dppx) {}
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