Fast way to check media queries in javascript (based on Foundation 5 sizing)

check_media_query.js

// Each statement returns true or false based on current viewport
// The EM units are based on html, body { font-size: 100%; } CSS
    
window.MQ = {

    // max-width 640px mobile-only styles 
    small       : (matchMedia('only screen and (max-width: 40em)').matches),
        
    // min-width 641px and max-width 1024px screen only        
    medium      : (matchMedia('only screen and (min-width:40.063em) and (max-width:64em)').matches),
        
    // min-width 641px screen only
    mediumUp    : (matchMedia('only screen and (min-width:40.063em)').matches),
        
    // max-width 1024px screen only
    mediumDown  : (matchMedia('only screen and (max-width:64em)').matches),
        
    // min-width 1025px and max-width 1441px screen only         
    large       : (matchMedia('only screen and (min-width:64.063em) and (max-width:90em)').matches),
        
    // min-width 1025px screen only
    largeUp     : (matchMedia('only screen and (min-width:64.063em)').matches),
        
    // max-width 1441px screen only
    largeDown   : (matchMedia('only screen and (max-width:90em)').matches),
        
    // min-width 1025px and max-width 1440px screen only          
    xlarge      : (matchMedia('only screen and (min-width:90.063em) and (max-width:119.063em)').matches),
        
    // min-width 1025px screen only
    xlargeUp    : (matchMedia('only screen and (min-width:90.063em)').matches),
        
    // max-width 1440px screen only
    xlargeDown  : (matchMedia('only screen and (max-width:119.063em)').matches),
        
    // min-width 1440px screen only         
    xxlarge     : (matchMedia('only screen and (min-width:120.063em)').matches),
        
    // returns true for touch devices
    touch       : ('ontouchstart' in window),
        
    // detect portrait orientation
    portrait    : (matchMedia('only screen and (orientation: portrait)')),
        
    // detect portrait orientation
    landscape   : (matchMedia('only screen and (orientation: landscape)')),
            
};