尝试在ruby中使用open-uri，一些HTML内容以“正在加载......”的形式出现。

I am trying to create a program to compare a specific thing on a webpage, and then compare it another time, I'm currently working on getting the piece of information that will change. But, the text that would change appears if I inspect element in the page, but not if I use open-uri, it comes in as "Loading..." (see picture), is there a way to get all the HTML text? I am trying to create a program to compare a sp