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This post and video will show how to customize Model-Driven apps integrating JavaScript code to set a tab in the form as visible or invisible, depending on another field in the form. This example is focused on a simple customization but the general process of Model-Driven Apps form customization with JavaScript usually follows the same steps:
- Set up form in Dataverse table
- Write JavaScript code
- Add the JavaScript library in the app or solution
- Import the JavaScript library to the form
- Assign a function to execute on an event such as form OnLoad or OnSave or field OnChange.
Use case description
The example shown in the videos focuses on a project management scenario where projects can be categorized as belonging to a single company or multiple companies. The goal is to dynamically show or hide a “Companies” tab on the project form depending on the project type selected by the user.
Solution description
To address this, a JavaScript function is written to read the project type value from the form and conditionally hide or show the tab. The JavaScript is then uploaded as a web resource within the Dataverse environment and linked to the form events.
Step 1. Setting Up the Form
In the example, we’re working with a Projects table with a Project Type choice column (values: single company, multiple companies, etc.). A related table links projects to companies. The goal is to show a “Companies” tab only when the project type is “multiple companies.”
The form will have a single-column tab named Companies (backend name: tab_companies) and this the tab we want to dynamically hide or show based on the project type field.
Step 2. Creating the Model-Driven App
We need to create a new model-driven app is created within a solution, and add the Projects table as a new page.
Step 3. Writing JavaScript Code to Hide/Show Tab
For this simple customization, this is the code being used:
function fxHideShowTab(executionContext) {
var formContext = executionContext.getFormContext();
var projectType = formContext.getAttribute('{column-name}').getValue();
var detailTab = formContext.ui.tabs.get('{tab-name}');
if (projectType == 891540000)
{
detailTab.setVisible(true);
}
else
{
detailTab.setVisible(false);
}
}
Step 4. Uploading JavaScript code to Dataverse
Go to JS and then “Add Library”
Next, click on “+ Web resource”
In the next panel, add the code, file name and type and Save and Publish
Once saved, we need to select the resource we just uploaded. Use the search bar to find it faster, select it and then click on add
Step 5. Adding event handlers to trigger the code
Go to the form’s events and add a new event handler
Select the library, function name and enable the two checkboxes:
After this is done we can test and run the app to make sure all works properly!
Step-by-step video walkthrough
Watch the video below to see a step-by-step walkthrough by Graciela, where she shows the process of Model-Driven App form customization with JavaScript
How our Power Apps Development services can help
Model-driven apps customization through JavaScript can be really powerful and can be applied to many different use cases such as validating subgrid content or hide fields from a Business Process flow to certain users. Using our Power Apps y Power Platform consulting services, we have implemented many customizations in model-driven apps and Dataverse forms, contáctanos, we’ll be more than happy to have a conversation and see how we can be of help for your team.
