You can get useful information about the device or the app's current state via the $env variable.

Note that $env is a read-only variable, so you can only read and not write to it.

You can access them using templates, just like other variables (global variable, cache, local variables).

Supported Attributes

• $env.device.width : device width
• $env.device.height : device height
• $env.device.os.name : os name
• $env.device.os.version : os version
• $env.device.language: device language ("en-US", etc.)
• $env.view.url: current view url

Example

{
  "$jason": {
    "head": {
      "title": "$env.device access",
      "actions": {
        "$load": {
          "type": "$render"
        }
      },
      "templates": {
        "body": {
          "sections": [
            {
              "items": [
                {
                  "type": "label",
                  "text": "Device width: {{$env.device.width}}"
                },
                {
                  "type": "label",
                  "text": "Device height: {{$env.device.height}}"
                },
                {
                  "type": "label",
                  "text": "{{$env.device.os.name}}"
                },
                {
                  "type": "label",
                  "text": "version: {{$env.device.os.version}}"
                },
                {
                  "type": "label",
                  "text": "version: {{$env.device.language}}"
                }
              ]
            }
          ]
        }
      }
    }
  }
}