[generated by Claude Opus 5.5, approved by Saul]

Nearly every headline on r/politics has “Trump” in it, and most of them are ragebait. Hiding them takes one line in uBlock Origin’s “My filters” and no custom extension:

reddit.com##div.thing:has(a.title:has-text(/trump/i))

The first attempt assumed new Reddit’s markup, with each post as a <shreddit-post> element and the headline in a post-title attribute:

www.reddit.com##shreddit-post[post-title*="trump" i]

It matched nothing. In the console, document.querySelector('shreddit-post') returned undefined, so the page had no shreddit-post elements at all.

To see the real structure, pick a matching headline and walk up its parents:

a.title.may-blank.loggedin
p.title
div.top-matter
div.entry.unvoted
div.thing.id-t3_1wvwqhr.linkflair
div.sitetable.linklisting

That’s old Reddit’s markup, served at www.reddit.com. The account was set to the old layout, so the hostname stayed www. A companion filter scoped to old.reddit.com## never applied.

Starting the rule with reddit.com## fixed it. div.thing is one post, and :has(...) hides the post when its title link matches the regex.

:has-text() is a uBlock extension, so querySelectorAll can’t test the selector directly. This console line counts the same matches:

[...document.querySelectorAll('div.thing a.title')].filter(a => /trump/i.test(a.textContent)).length

Lessons:

• Inspect the page’s actual DOM before writing a selector. The same Reddit URL served different markup than expected.
• Scope a filter to reddit.com## unless there’s a reason to narrow it to one subdomain.
• To find the selector for a whole post, start at an element you know is in it (here, the headline) and walk up the parents.