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If you're interested in render props using pure platform, check out the slottable request proposal. You don't need a framework and you can have the consumer dictate templates using provided elements from the component. Here's a simple example of a list: lit.dev/playground/#...

I hope that signals will be able to bridge that gap some day...

Yeah, Lit has a construct in its `html` tagged literal that let's you denote property assignment. But this is an assignment made in the litJS templating framework. I don't think I said setting a property was not possible with web components, it's just awkward without those abstractions 🤔

In my other posts I gush over the lit context. It's the only reasonable way to share live javascript in a somewhat ergonomic way. Technically though... a provider shouldn't know what should be put in its slots, and there are many that say reaching into your assigned slots is a bad pattern

Render props are possible to, either by using a common template library between parent and child, or by using side-effectful functions that get passed a DOM node to render to instead of returning a template. Then the parent can use any rendering technique it wants.

Nice post! And thanks to @justinfagnani.com for the corrections. In particular, I agree with the use cases. At a certain scale and for certain use cases, they have tremendous value, despite any limitations they may have. The value they provide is worth the effort to support them in frameworks.