Implementing a "Dynamic JS" button

 In Oracle APEX, implementing a "Dynamic JS" button means creating a button that, when clicked, executes custom JavaScript code dynamically on the client side. This is useful to add interactivity, manipulate page elements, or call APIs without requiring a page submit.

What is a "Dynamic JS" Button?

A button that triggers JavaScript code dynamically on the page, often via a Dynamic Action that runs JavaScript on click. This allows you to perform client-side logic instantly, like showing/hiding regions, updating items, calling REST services via AJAX, or manipulating the DOM.

How to Implement a "Dynamic JS" Button in Oracle APEX

1. Create the Button

• Open your APEX application and navigate to the page.

• In Page Designer, create a new button (e.g., BTN_DYNAMIC_JS).

• Set its Action to Defined by Dynamic Action (so it doesn’t submit the page).

2. Create a Dynamic Action for the Button

• Select the button BTN_DYNAMIC_JS.

• Create a new Dynamic Action with Event = Click.

• Add a True Action with Action = Execute JavaScript Code.

3. Write Your JavaScript Code

In the Execute JavaScript Code section, enter the JavaScript you want to run when the button is clicked. For example:

// Example: Show an alert with a message
alert('Dynamic JavaScript Button Clicked!');

// Example: Hide a region with Static ID "my_region"
$('#my_region').hide();

// Example: Set a page item value dynamically
$s('P1_MY_ITEM', 'New Value');

// Example: Trigger a refresh on a region
apex.region('my_region').refresh();

4. Optional: Use Page Items and Dynamic Data

You can access and modify page items dynamically with JavaScript:

• Get item value: var val = $v('P1_MY_ITEM');

• Set item value: $s('P1_MY_ITEM', 'New Value');

5. Additional Example

The Dynamic JS button updates the text fields dynamically using JavaScript.

Implementation Steps

1. Set the Button Action to Defined by Dynamic Action.

2. Create a Dynamic Action with the following attributes: 

• Event: Click

• Action: Execute JavaScript Code

• JavaScript Code:

$s("P1_FNAME", "John");

$s("P1_LNAME", "Doe");

This script sets the values of the text fields to "John" and "Doe" when the button is clicked.

6. Test the Button

Run the page, click the button, and see your JavaScript code in action.

Why Use a Dynamic JS Button?

• Instant UI updates without server round trips.

• Customize page behavior dynamically.

• Integrate third-party libraries or APIs.

• Enhance user experience with animations, validations, or dynamic content.

Important Considerations

• JavaScript runs on the client browser; keep security in mind.

• Use jQuery selectors carefully to avoid affecting unintended elements.

• For server-side logic, use AJAX callbacks or page submits instead.

• Debug JavaScript using browser developer tools (Console tab).

If you want, I can help you write JavaScript examples for specific use cases like refreshing regions, calling REST APIs, or toggling page elements dynamically. Just ask!