[gbuk2013]

I have to say I am not a fan of doing this on the client side.

API gateways (which is what server side load-balancer can be abstracted as) serve as important control points for service traffic, for example for auth, monitoring and observability, application firewall, rate limiting etc.

In my general experience code running on the client side is less reliable due to permutations of browsers, flaky networks, challenges with observability.

That said, client side already has one type of load balancing - DNS - but that doesn’t address the availability challenge.