// With touch zooming.
// <meta name="viewport" content="width=device-width, initial-scale=1">
%meta{content: 'initial-scale=1, width=device-width', name: 'viewport'}

// No touch zooming.
// <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
%meta{content: 'initial-scale=1, maximum-scale=1, user-scalable=no, width=device-width', name: 'viewport'}