Enjoying the Journey and making a commitment

// Autosize iframe
var funcSizeResponse = function( e ) {

var origin = document.createElement( 'a' );
origin.href = e.origin;

// Verify message origin
if ( 'embeds.go.ione.nyc' !== origin.host )
return;

// Verify message is in a format we expect
if ( 'object' !== typeof e.data || undefined === e.data.msg_type )
return;

switch ( e.data.msg_type ) {
case 'poll_size:response':
var iframe = document.getElementById( e.data._request.frame_id );

if ( iframe && '' === iframe.width )
iframe.width = '100%';
if ( iframe && '' === iframe.height )
iframe.height = parseInt( e.data.height );

return;
default:
return;
}
}

if ( 'function' === typeof window.addEventListener ) {
window.addEventListener( 'message', funcSizeResponse, false );
} else if ( 'function' === typeof window.attachEvent ) {
window.attachEvent( 'onmessage', funcSizeResponse );
}
}
if (document.readyState === 'complete') { func.apply(); /* compat for infinite scroll */ }
else if ( document.addEventListener ) { document.addEventListener( 'DOMContentLoaded', func, false ); }
else if ( document.attachEvent ) { document.attachEvent( 'onreadystatechange', func ); }
} )();