Why Gov.UK Stopped Using jQuery

The head of the UK government's digital transformation unit recently announced a change to the nation's government services site gov.uk: they've 'removed jQuery as a dependency for all frontend apps, meaning 32 KB of minified and compressed JavaScript was removed' for everything from selecting elements to attaching event listeners....

Nearly 84% of mobile pages used jQuery in 2021, points out a new essay at Gov.UK — before explaining why they decided not to:

jQuery was an instrumental tool in a time when we really needed a way to script interactivity in a way that smoothed over the differing implementations of stuff like event handling, selecting elements, animating elements, and so on.

The web is better because of jQuery — not just because it has such incredible utility, but because its ubiquity led to making what it provided part of the web platform itself. Nowadays, we can do just about anything jQuery can do in vanilla JavaScript... It really begs the question: Do we really need jQuery today? That's a question that GOV.UK has answered with a resounding 'no'....

This is a big deal when it comes to the user experience, because GOV.UK provides services and information online for The United Kingdom at scale. Not everyone is tapping away on their 2022 MacBook Pro on a rip-roarin' broadband connection. GOV.UK has to be accessible to everyone, and that means keepin' it lean.... dependencies matter when it comes to performance. Don't shortchange your users if the web platform can easily do the job a framework can.

This level of commitment to the user experience from a institution that works at the scale GOV.UK does is commendable. I can only hope others follow in their footsteps.

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