Welcome to the community, @Al_Huizenga! :grinning_face_with_big_eyes: That’s correct. If you see the red squiggly underline below something in a script that you’re editing in Airtable, that’s an immediate indicator that something is amiss. Hover over that item and a popup will appear sharing more details about what’s wrong. In this case, the message confirms that DOMParser isn’t recognized:
Because Airtable’s scripting API—in both the Scripting app and in automation scripting actions—is focused on letting users interact with Airtable data, things related to the DOM aren’t going to work.