# JavaScript Optimisation

Keep the browser's main thread free for what visitors actually came to see, instead of tying it up running scripts they don't need yet.

## The problem it solves

JavaScript is expensive in a way CSS isn't: the browser has to download it, parse it, and often execute it before it can continue rendering the page — and a lot of what loads on a typical WordPress page (analytics trackers, chat widgets, marketing pixels) has nothing to do with what a visitor sees in the first few seconds.

## How it helps

Dotjuice Pagespeed combines and minifies your local scripts to cut down on requests, then goes further with two complementary techniques: deferring scripts so they run after the page has rendered rather than blocking it, and — for scripts that genuinely don't need to run until a visitor interacts with the page at all — delaying them until the first scroll, click, or tap.

Every exclusion is handled automatically. jQuery, Elementor's own scripts, checkout and payment processors, and any script carrying page-specific data are detected and left untouched, so the aggressive optimisations apply only where they're safe.

## The result

A page that's interactive sooner, because the browser isn't stuck executing a marketing pixel's JavaScript before it can respond to a click.