# Mobile Detect --- Enable the Mobile Detect under [Settings](options-general.php?page=ccs_reference&tab=settings). Use `[is]` to display content based on device type. ~~~ [is mobile] User is on a phone or tablet. [else] User is not on a mobile device. [/is] ~~~ The parameters available are: *mobile*, *phone*, *tablet*, and *computer*. ### Examples *Image sizes* ~~~ [is mobile] [field image size=medium] [else] [field image size=large] [/is] ~~~ *Stylesheets* ~~~ [is computer] [load css=style.css] [else] [load css=style-mobile.css] [/is] ~~~ *Redirect visitors on mobile* ~~~ [is mobile] [redirect][url site]/mobile/[/redirect] [/is] ~~~ These last two would be placed in a custom field named *css*, to load in the head of the page.   ### Body class There are CSS classes added to the <body> element, for styling purposes: *.is_phone, .isnt_phone, .is_tablet, .is_mobile,* *.is_computer* and *.isnt_computer*.   ### Library Device detection is based on a lightweight PHP class, [Mobile Detect](http://mobiledetect.net) version 2.8.12. Mobile Detect works with user-agent detection on the server side. *It will not work if the page is cached.*