uswds VS window.fetch polyfill

Now and then I stumble upon the USWDS (the article mentions it) and am surprised how good that thing actually is.

I would like to note that there currently is no centralized Design System for the Dutch Government, unfortunately. All agencies are creating their own Design System based on the Rijkshuisstijl.

Currently I'm working on ROOS (https://rvo.nl/roos) which is the Design System for the Netherlands Enterprise Agency. This is build with the already mentioned NL Design System. My hope being that this will bring the different agencies together and start working on a centralized Design System for the Dutch Government and follow the excellent examples of https://design-system.service.gov.uk and https://designsystem.digital.gov/

I learnt a lot of Sass patterns from using the US Web Design System.

USWDS: https://designsystem.digital.gov/

FYI I recommend following U.S. gov't standards: https://designsystem.digital.gov/documentation/developers/

Dark/light mode is fine and all, however be wary of accessibility. Note that the US actually even publishes it's own CSS/JS framework similar to bootstrap. I believe (but I am not positive) it is here: https://designsystem.digital.gov/

I don't claim it to be perfect, but the last time I had the opportunity to use it, it put other UI/UX frameworks to shame.

Most js libraries use XMLHttpRequest and so provide HTTP_X_REQUESTED_WITH: XMLHttpRequest, but neither Chrome's implementation nor Github's polyfill of the new fetch uses a similar header. So how can one detect that the request is AJAX?

In this case, Github offers a great fetch polyfill for browsers: https://github.com/github/fetch

You can polyfill fetch() if that's a concern:

https://github.com/github/fetch

I'm using this fetch polyfill in Redux with redux-promise-middleware.