How do you get the elements of a page using html service?

How can you actually get the ELEMENTS of a page, using html service? This is a question I have for a long time, and I don't actually get the answer.

If you use:

htmlservice:GetAsync("url")

It would just return the main js code of the page. But if i'm looking for a text in a page i won't look on the coding, but on the object creating, (html).

If someone has the answer I would like to get it. Thanks.

To be pedantic, the service name is actually HttpService, and you're talking about HTML being returned, not JavaScript.

Regardless, you need to parse the HTML. Here's a helpful HTML parser in Lua that should be able to help.