---
title: UI Event
slug: v111/ui-event
icon: {"faIcon":"fa-solid fa-pager"}
docTags:
createdAt: 2025-06-10T06:44:31.749Z
---
A UI Event automates business logics on a Servicely Table’s form and/or fields as they are loaded or as you interact with them on your web browser, i.e. doing field updates or saving your changes on the form.
- It runs on the client side (your computer’s web browser)
- It can call [System Controllers](docId\:KRCIsVL2mOXebJiydZ_oh) to run server side functions (also refer to [Table API (Server)](docId\:Jv5jxVD7j4UkkYs-_MUiN) )
- It has access to the current record displayed on the form
- It has access to classes and functions within client accessible Application Properties (refer to [Application Properties](docId:8yXw40PPTdz4Lx8wl8-cx) )
:::hint{type="warning"}
Javascript knowledge is required
:::
# Creating a UI Event
| **Field name** | **Field type** | **Description** | **Sample value** |
| -------------- | -------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Name | String | Name of the UI Event for administrative purposes | Incident - Set Requested for based on selected Requestor |
| Event type | Choice | Whether the UI Event is to run based on a field or a form:
- Field event
- Form event | Field event |
| Event name | Choice | Action taking place that should result in this UI Event run:
If Event type is “Field event”, the valid events to choose from are:
- On change - \<*runs when form is loading or when nominated Field on UI event changes its value*>
- On relation update - \<*runs when a related list is updated with entries added or removed*>
If Event type is “Form event”, the valid events to choose from are:
- On form load - \<*runs when a form has finished loading*>
- On form submit - \<*runs after you submit changes on the form by pressing the Save button*>
Only for “On form submit”, your script can return either true or false to decide whether or not to allow the form’s submission (create or update of a record) to proceed. | On change |
| Active | Boolean | When active, the UI Event will be available to run should it meets the configured events | Yes |
| Table | Reference | Table the UI Event applies to | Incident |
| Field | Reference | Available if Event type is “Field event”. The UI Event runs when the Field’s value on the form has been updated. | Requestor |
| Application | Reference | Application that the UI Event is packaged under | itsm |
| Description | String | Provides more details about what the UI Event is for, for administrative purposes | When a Requestor is set on an Incident, copy them across as an Incident’s Requested for if it isn’t set already |
| Script | Script | Client side script the UI Event runs. The script has access to:
1. The “current” object that represents the current record.
2. The “viewAspect” variable the represents the view aspect shown on the form the UI Event runs on. Please refer to [Aspects & Views](docId:5g4NNmbj2uEtsxm0mzNBn) for more information about view aspects.
3. The “isLoading” variable that returns true when the form is loading
ℹ️ For “On form submit” event:
Provide a *return false;* if you need to prevent a form’s submission.
Not providing a return value is the same as providing a *return true;* statement | if (current.Requestor.hasValue() && !current.RequestedFor.hasValue()) \{ current.RequestedFor(current.Requestor.value());}
Please refer to the Examples section below for other examples/use cases. This primarily uses the[Table API (Client)](docId:8U7ZQ2Hm03_z55XWg4rrh) and [User Object (Client and Server)](docId\:LInNoHio1ZYyKAZd_NlSs) (Client side only). |
# Examples
**Make Assignee required only when status is not new for a viewAspect called “ServiceDesk”**
| **Field** | **Value** |
| ----------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |
| Name | Incident - Always for ServiceDesk aspect |
| Event type | Form event |
| Event name | On form load |
| Active | Yes |
| Table | Incident |
| Description | When viewAspect is “Service Desk” and status is not new, always set the assignee to be required. Otherwise keep optional. Keep hidden for all other aspects. |
| Script | if (viewAspect == “ServiceDesk” && current.WorkflowStatus() != “new”) \{
current.Assignee.visible(true);
current.Assignee.required(true);
} else \{
current.Assignee.required(false);
if (viewAspect != "ServiceDesk") \{
current.Assignee.visible(false);
}
} |
**Default an Incident’s Location based on Requestor’s location data, using a controller**
:::hint{type="info"}
This requires the use of a Controller as we need to query an Incident’s Requestor user record and get their Location.
:::
| **Field** | **Value** |
| ----------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| Name | Incident - Default Location based on Requestor |
| Event type | Field event |
| Event name | On change |
| Active | Yes |
| Table | Incident |
| Field | Requestor |
| Description | Once a Requestor is selected/updated, if an Incident’s Location is blank, set the Location based on that user record |
| Script | //Assuming there is a Requestor, form is not loading, Location is not already set
if (!isLoading && current.Requestor.hasValue() && !current.Location.hasValue()) \{
//Create a parameter object to provide with our request to the controller
var requestObj = \{};
requestObj.userId = current.Requestor();
//Call the server with the information required.
WS.controller("UserInfoController", requestObj)
.done(function(response) \{
current.Location(String(response.data.locationID));
//If there was an error, add it to the console log.
}).fail(function(response) \{
console.log("UserInfoController: Start Error");
console.log(response);
console.log("UserInfoController: End Error");
});
}
Refer to below for sample of the Controller. |
[System Controllers](docId\:KRCIsVL2mOXebJiydZ_oh) “UserInfoController” Script referenced in the UI Event’s script in above example, can look like the following (variable “locationID” is what the Controller returns and the UI Event makes use of):
```javascript
answer = {};
// Query the User table for the record with the provided userId parameter.
if (userId) {
let userRec = Table("User", userId);
if (userRec) {
if (userRec.Location.hasValue()) {
answer.locationID = userRec.Location.value();
}
}
}
answer;
```
**Default an Incident’s Location based on Requestor’s location data, using a REST call**
The UI Event can be configured the same way per the above example with a Controller, but the UI Event script should look like the following instead:
```javascript
//Assuming there is a Requestor, form is not loading, Location is not already set
if (!isLoading && current.Requestor.hasValue() && !current.Location.hasValue()) {
REST.get("User", current.Requestor(), { fields: "Location" })
.then(response => {
current.Location(response.data.Location);
});
}
```