alt Hacker NewsAs someone who writes html only rarely (I'm more of a "backend" guy, and even use that term loosely.. most of my webdev experience dates back to the CGI days and often the html was spat out by Perl scripts) and usually in vim, I am pleased to know there is an in-built solution outside of me properly indenting or manually counting divs. Thanks for enlightening me.
A more common alternative to counting divs would be CSS classnames or (for unique elements on the page) IDs. You'd do `document.querySelector('.my-class')` to locate `<div class="my-class">` or similar, rather than using the fact that e.g. something is nested 3 divs inside <body>.
Even if this custom element trick didn't work, I don't see why one would need to count divs (at least if you control the markup, but if not then made-up tags aren't an option anyway). The article even mentions using class names as an option.