``Function

Common features shared by all Functions. More info.

• ``Function

  • Parameters

    • Update parameters

  • Outgoing Triggers

    • Event structure

    • Type: functionExecuted

    • Type: functionUpdated

    • Type: functionClosed

    • Type: error

  • Permissions (beta)

    • for: read

Parameters

Key	Description	Default value	Possible values
name	Name of the Function	undefined	string
stayAlive	Prevent the Function from being destroyed after execution.	none	none: destroy after execution dashboard: stay alive until dashboard switch session: stay alive until page refresh. execution: stay alive until (but no longer than) Function executed succesfully, even if Dashboard was switched in the meantime.
kill	If set to true, closes an open Function.	undefined	true
showErrors	If set to false, errors occurring in the Function will not be shown.	false	true/false
_instance	Specifies an existing instance that should be updated. If the instance does not exist, it will be created. More info: Updating Functions	_new
_instanceUpdateOnly	If set to true, will only update the given instance (_instance) if it already exist. Will not create new instance.	false	true/false
_path	Value that will persist through following Triggers. More info	Incoming $_path value.	object
_update	Changes values in lists.		Possible keys: add, remove, set, change, update. See explanation below.

Update parameters

The #_update parameter allows updating of parameters that are lists in the Function. These are the options.

Key	Description
_update.add	Adds values to lists.
_update.remove	Removes values from lists.
_update.set	Adds or updates values in lists.
_update.change	Changes properties of objects in lists.
_update.update	Updates values in lists.

Each of the update operators (add, remove, set, update and change) take an object of lists, with parameter names as keys and a list of items to add/remove/update/change as values. E.g.: #_update.remove.myList: [{id:15},{id:20},{id:110}] removes the items with id 15, 20 and 110 from the list stored in the parameter myList. More info.

Outgoing Triggers

Event structure

Every outgoing Trigger from any Function contains a base set of properties. Specific Functions may add properties to this event, often depending on the event type. The base properties are listed below:

Key	Description	Possible values
type	Trigger event type.	Any of the Function's Trigger event types
_function	Accessible internal data of the origin Function.	Object with all parameters and their values.
_function.name (example)	One of the Function parameters.	The value of the parameter.
_path	If not specifically altered, this will be passed on from Function to Function	Object with custom properties and values.

---

Type: functionExecuted

Fires when the Function has completed its execution actions.

Additional event properties (besides the inherited properties):

Key	Description	Possible values
data	Parameter values with which the Function was executed.	object

---

Type: functionUpdated

Fires when the Function model was updated.

Additional event properties (besides the inherited properties):

Key	Description	Possible values
data	Changed values in the model	object
changed	Array of changed paths	array

---

Type: functionClosed

Fires when the function instance was closed.

Additional event properties (besides the inherited properties):

Key	Description	Possible values
origin	Indicates the origin of the closing.	user/function/replaced*

* Origin values explained:

• user: when the user closes the Function by closing a panel.
• function: when the Function closes itself or gets closed by an incoming Trigger.
• replaced: when the Function (View)'s panel gets re-used for another Function.

---

Type: error

Fires when the Function encounters an error.

Additional event properties (besides the inherited properties):

Key	Description	Possible values
error	Error object containing error information	object

Permissions (beta)

All Functions can require the following Permissions:

for: read

Determines: whether or not the Function can be read or loaded.

No context
The (%) in this permission requirement is an empty object.