Hi tuanphan,
Here is the link: https://www.pixelhaze.academy/test
Effectively, what I'm trying to do is discover the tags/categories for the individual summary items in the summary block on the page using JS on the page that houses the summary block.
For example, the "FREE SQUARESPACE PLUGINS: 11 FREE SQUARESPACE CSS CUSTOM CODE TO SPRUCE UP SQSP" blog post has the tags "custom css for squarespace" and "squarespace css code", whereas the the blog post "SEO FOR BRANDED SEARCH - WHY IT IS VITAL TO YOUR BOTTOM LINE AND WHAT YOU NEED TO DO" blog post has the tags "squarespace seo" and "local seo".