https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API

As discussed in #78, there are several polyfills that allow web applications to use the Fetch API in browsers that don't support them, but the browsers that HtmlUnit can behave as most (or all?) already support fetch natively.

One option is to implement the api directly by using a polyfill, referencing some appropriately licensed JS so that when the application calls fetch(), HtmlUnit doesn't need to actually have any specific code, just let the polyfill call XmlHttpRequest which is already supported.

This strategy could be used to populate many browser APIs that can be largely implemented using existing features. This feature (or something even simpler) implemented by a project member could also serve as an example for how outside contributors could easily help by finding and hooking up quality polyfills for other yet to be implemented features.