Try for free
Try for free

3 documents tagged with “JavaScript”

Back to all tags.

JavaScript is the biggest stumbling block of modern site speed. Bundles that have grown to the point where downloading them takes seconds, reactive UI computations that block the main thread, and third-party scripts that add kilobytes with no obvious benefit.

Under the JavaScript tag you will find articles on optimising the bundle, code splitting, dealing with long tasks, debouncing event handlers, and what to do when your INP is in the red zone.

Accelerate React: 6 Proven Tips for Optimizing Core Web Vitals

React is a popular tool for developing modern websites, but speed and interactivity are not always automatic. In this article, we present key techniques for optimizing Core Web Vitals – from hydration, through <Suspense>, to DOM handling – and show you how to use them to speed up your React projects.

JS Long Tasks (JSLT) Metric: When Your Website Forgets to Breathe

We explain how the JS Long Tasks metric measures digital traffic jams caused by long tasks and what these jams could mean for your users and your business.

setTimeout: Optimising Long Tasks in JS

The setTimeout() method is used to optimise long tasks in JavaScript that block user interactions and degrade metrics such as Total Blocking Time (TBT) or Interaction to Next Paint (INP), a vital part of the Core Web Vitals suite.

Can we use cookies to keep track of how you use the website?

Preferences

Can we use cookies to keep track of how you use the website?

Necessary for the site to function

Necessary cookies help make the website usable by enabling basic functions such as page navigation and access to secure areas of the website. Without these cookies, the website cannot function properly.

Personalization so you can save your settings

Default cookies allow a website to remember information that changes the way the website behaves or looks, such as your preferred language or the region you are in.

Analytics so we can improve the site

Analytical cookies help website owners understand how visitors interact with websites by anonymously collecting and reporting information.

Marketing so you can ask us questions via chat

Marketing cookies are used to track visitors across websites. The intention is to display advertisements that are relevant and engaging to the individual user, making them more valuable to publishers and third-party advertisers.