App Params

App params are returned by the back-end once a user logged in. You can use these params in the front-end. For example, Espo has a build-in app-param containing a list of entity types that can be printed to PDF for a current user.

Custom app params

You can make the system to return custom parameters. This params can be unique for a current user (different user have different values in params).

Create a file: custom/Espo/Custom/Resources/metadata/app/appParams.json:

json { "myParam": { "className": "Espo\\Custom\\Core\\AppParams\\MyParam" } }

Create a file custom/Espo/Custom/Core/AppParams/MyParam.php:

```php <?php namespace Espo\Custom\Core\AppParams;

use Espo\Tools\App\AppParam;

class MyParam implements AppParam { public function __construct( // Pass needed dependencies. ) {}

public function get(): mixed
{
    // Value fetching logic.
    // Your value can be a scalar, array or stdClass.

    return $someValue;
}

```

Clear cache.

In the front-end (in a View) you can access your parameter the following way:

js this.getHelper().getAppParam('myParam');