We've all heard it for years; the Angular chorus: "Thou shalt not access the DOM directly." Fact is though, avoiding it can cause a lot of Angular-itis. JQLite didn't really cut it, so it was no surprise JQuery was a staple in an Angular codebase, even if just to be able to easily select by ID. Add that most web devs are comfortable with JQuery, and there you go. You even see document.querySelect ( 'the_id' ) all the time.
Angular 2 provides an interesting option here. Read more about it at my website.
If you have other interesting options, feel free to compare and contrast.