Regular checkup
You can measure DOM size and depth on your site using a tool like Lighthouse or PageSpeed Insights . If you want to quickly check how many elements you have on the page at any given time, you can run this on your browser’s console:
The main thing is to periodically check your DOM size and depth . I know this sounds obvious, but since we typically work with UI components or template partials that only expose us to a bit of HTML at a time, it’s easy to forget about how these bits of markup add up.
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