Rails Form Helper for the viewport META tag

Creates the meta tag for Bootstrap with the specified parameters:

    <%= viewport_meta_tag %>

 Renders:

    <meta content="width=device-width,initial-scale=1.0" name="viewport" />

You can change the content value by passing a hash as an argument:

    <%= viewport_meta_tag(:maximum_scale => "1.0") %>

Renders:

    <meta content="width=device-width,initial-scale=1.0,maximum-scale=1.0" name="viewport" />