From T309425: Figure out which demos to display on the Button demo page and discussion on a patch, it became clear that the implementation of configurable icons for slot content in the button demo, and likely also for prop usage in the text input, is not as intuitive to everyone. How can this be made more accessible to new developers on the doc site?

Since the patch for T305396: Create a configurable demo for MenuItem has merged, we can set the initial value for icon properties and slot contents, maybe using that will make it clearer?