Astro - how to pass data from the server- to the client-side JavaScript

I'm sorry for not providing any code but I have doubts on whether my code would be even relevant in light of my question. Also, I have no idea which part of the code could be helpful, so, when asked for, I'll provide the requested part of the code, probably using some playground. I'm coding a relatively simple website, using Astro, and I seem to have an issue with passing data between the server- and client-side JavaScript. The thing is, I'm fetching some data inside the server-side JavaScript (Front Matter) and need those inside my client-side JavaScript, to simply filter them. I did some research and found out that, to be able to achieve my goal, I can: * use define:vars - this doesn't seem to work though, because I got a TypeScript error saying basically that this is not the TypeScript file (screen below). And I can actually imagine it isn't, since when the data is fetched from the server, I don't really have any .ts files, only the .js ones. But shouldn't Astro take care of it on the production mode? * do this: https://docs.astro.build/en/guides/client-side-scripts/#pass-frontmatter-variables-to-scripts - and this one actually works. But, to be able to pass my data, I had to create an empty div and assign my whole array of (15 as of now) objects as a data-attribute. Which, I have no doubts, is the worst possible approach since I have all of this in my HTML markup (what if I had a million objects, instead of 15?). So, currently, I treat this as a temporary workaround, to be able to test the filtering library I intend to use. * do some other stuff (https://stackoverflow.com/questions/73511984/how-do-i-pass-a-server-variable-to-client-side-js-in-astro/74852745#74852745) which I don't even understand very well

Astro Documentation

Scripts and Event Handling

How to add client-side interactivity to Astro components using native browser JavaScript APIs.

Stack Overflow

How do I pass a server variable to client side JS in astro?

I found this (github) html starter page for google auth, and I wanted to make it into a astro component. Im wanted to convert this to a .astro file and be able to pass in the variables for CLIENT_I...