Hi all, I have a dropdown based on which a message should be displayed unde

What version of Appian are you using?

7.3

Based on your post I assume you're not using Tempo Enabled nor SAIL forms. I suggest you explore the capabilities offered by SAIL to start moving away from JavaScript in order to make your forms compatible with mobile devices.

Here are some useful links for you to start considering moving to SAIL and get dynamic capabilities without JavaScript

forum.appian.com/.../SAIL_Components.html
forum.appian.com/.../SAIL_Recipes.html

If you're not on SAIL yet then you can still achieve your requirement by adding the following function to your Custom JS library and then just invoke it passing the fieldId of your dropdown as the first parameter and the new text you want to display as the second one. This function basically updates the instructions field below the component which is the same place where validation errors are displayed.

function addInstructionsToField(fieldId, instructions) {
          $("#fd_component_" + window.FormDesigner.runtimeNamespace + fieldId + " .instructions").css("display", "block");
          $("#fd_component_" + window.FormDesigner.runtimeNamespace + fieldId + " .instructions").html(instructions);

}

Thank you Eduardo. Will implement and try.