Javascript: App Width Constants

Constants.js

App.Constants.DESKTOP   = 990,
App.Constants.TABLETLG  = 980,
App.Constants.TABLETSM  = 768,
App.Constants.MOBILE    = 767;

App.Constants.MOBILEMQ  = 'only screen and (max-width: ' + App.Constants.MOBILE + 'px)',
App.Constants.TABLETMQ  = 'only screen and (max-width: ' + App.Constants.TABLETLG + 'px)',
App.Constants.DESKTOPMQ = 'only screen and (min-width: ' + App.Constants.DESKTOP + 'px) and (max-width: 1199px)';
App.Constants.DESKTOPLGMQ = 'only screen and (min-width: 1200px)';

App.Constants.containerWidths = {
  lgDesktop:  1200,
  smDesktop:  940,
  tablet:     768
};