SYNTAX
  mfpdev app preview 
  [<platform>
  [--type|-t <browser>]
  [--watch+copy|-wc  |  --watch+prepare|-wp  |  --serve|-s] ]
  [--clientid <string>] [--secret <string>]
  [--noserver]


DESCRIPTION
  Opens a browser or browser simulator and displays a preview of a Cordova
  application.
  
  In interactive mode, this command asks you what platform to preview and what
  type of display to use: either the MobileFirst Mobile Browser Simulator or 
  a simple browser. The --watch+copy option is set by default in interactive
  mode.
  
  When running in preview mode, the app will not be able to communicate 
  with the MobileFirst Server in the same way as when it runs in a simulator or
  device. In preview mode, the only communication that the app can have with the
  MobileFirst Server is through the use of the WLResource JavaScript API,
  which is used to call adapters. All adapter calls go through without any
  type of authentication  challenge. When an adapter is called during preview, 
  the call is run through the preview's development proxy server with the 
  clientid and secret to retrieve an Oauth Confidential Client token. This 
  allows the adapter to be accessed without any authentication challenges.
  
  The command will prompt for server details, as needed, for preview to 
  server connectivity.
  
  You can view or change the clientid and secret with the 'mfpdev
  adapter call' command or in the MobileFirst Operations Console. 
  
  Cordova apps only:  
   * The cordova-plugin-whitelist plugin is temporarily removed during preview 
     so that the preview can display in a browser. 
   * With simple browser preview there is no Cordova simulation. Use the 
     Mobile Browser Simulator to preview Cordova apps.

OPTIONS
  <platform>: Platforms to preview (valid values are ios, android, windows).
  If you specify more than one platform, specify them by using a comma-separated
  list.
  
  If your comma-separated list of platforms contains one or more supported 
  platform, then those platforms are used. If the platforms that are passed in
  do not exist in the application or are invalid platforms, your app is 
  previewed by using the first valid platform in the application.
  
  [--type|-t <browser>]: The type of browser with which you preview your app.
  Valid values are 'browser' or 'mbs'. Specifying 'browser' starts your app
  in your system's default web browser. Specifying 'mbs' starts the 
  Mobile Browser Simulator. If no type is specified, the default 
  browser type is used. You can define the default browser type with  the 
  'mfpdev config' command. 
  
  [--watch+copy|-wc]: Specifies to watch the app's root www directory, and when 
  a file changes, to copy it directly to the corresponding 
  platforms/<platform>/www directory for each platform in your app.
  This also triggers a live reload. Only the changed files are copied.
  This option is enabled by default.
  
  [--watch+prepare|-wp:] Specifies to watch the app's root www directory and to
   run the 'cordova prepare' command when a file changes. Running 'cordova 
   prepare' copies all of the current files in the root www directory to all of
   the platforms/<platform>/www directories. This also triggers a live reload.
   
  [--serve|-s]: Specifies to serve the app to the browser, but to not watch any 
   directory for changes or copy changes anywhere. A live reload occurs only 
   when the 'cordova prepare' command is run.
   
  [--clientid <string>]: The client ID for an Oauth Confidential Client token. 
  Required for calling an adapter on a MobileFirst Server.
   
  [--secret <string>]: The secret for an Oauth Confidential Client token. 
  Required for calling an adapter on a MobileFirst Server.
   
  [--noserver]: Speeds up the time needed to display the preview if there's no
  need to connect to a MobileFirst Server. When this option is specified, no
  request is issued for server connectivity information. 

EXAMPLES
  Interactive mode:
  
    $ mfpdev app preview
    
    Displays a series of prompts to ask you how you want to preview the app.
    Use the up and down arrow keys on your keyboard to move through the 
    selections, and press the Enter key to select.
  
  Direct mode:
  
  $ mfpdev app preview ios --type mbs -wp
  
    Displays a preview of the iOS version of the app in the Mobile Browser 
    Simulator. The root www directory is watched, and if a file changes, the 
    'cordova prepare' command is run, propagating the change to all platforms. 
    Then, a live reload occurs. 