If you’re using javascript, you can build your popup in js, too: https://community.skuid.com/t/trigger-popup-from-javascript
Alterntively, you can use mBlazonry’s template component to listen for your event and use the action framework to build the popup. See https://community.skuid.com/t/template-component-with-action-framework and https://community.skuid.com/t/another-use-for-mb-template-w-action-framework-call-action-…
