mycoin / noah Goto Github PK

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);  
    }      
    return ratio;
};