Go lang执行JavaScript来检索页面中的文本

I'm trying to retrieve text that is loaded dynamically from a web page using golang.

The text to retrieve is on this page : https://www.protectedtext.com/testretrieve?1234

This text is encrypted by a password and then decrypted on client side and loaded dynamically on the page.

I already tried with goquery by selecting 'textarea' object, but I can't get the text cause it's loaded dynamically.

How can I achieve this ? By executing JS in Go ? It's working in my chrome console, but no ideas on how to do that in Go.

A lightweight solution is the best for my project. Or any other website that can store and edit same text without modifying the URL ?

You may need a headless browser to load the javascript like for example phantomgo

However looking at the page source code we can see that they use sha512 for the tab title and aes for the textarea field.

The page which you shared contains https://www.protectedtext.com/testretrieve?1234, only one element of class textarea-contents simple get class documents using goquery and get 0th part