Dynamic Visible UI Actions (ServiceNowDevProgram#878)

* Create README.md

* Update README.md

* Create script.js

Author: rene-el

Client Scripts/Dynamic UI Actions/README.md

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+# Dynamic Visible UI Actions
+
+This code snippet can be used to dynamically change the visibility of an UI action via a Client Script or UI Policy.
+As this happens on the client, it happens without the need of saving/reloading the form like you'd have to do if controlled via the UI Action's condition field (server-side). 
+
+As this uses DOM manipulation you might have to uncheck the "Isolate Script" field on the Client Script or UI Policy to make it work or make sure you have a system property "glide.script.block.client.globals" with a value of false if you're in a scoped application.
+
+**Note**: DOM manipulation should be used with caution. 
+
+
+
+

Client Scripts/Dynamic UI Actions/script.js

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+function onChange(control, oldValue, newValue, isLoading, isTemplate) {
+    if (isLoading || newValue === '') {
+        return;
+    }
+
+    // Adjust condition to your needs
+    if (newValue === "true") { 
+        $$('button[data-action-name^=action_name').each(function(e) { // replace action_name with the action name of the UI Action
+            e.hide();
+        });
+    } else {
+        $$('button[data-action-name^=action_name').each(function(e) { // replace action_name with the action name of the UI Action
+            e.show();
+        });
+    }
+}