Fragments

The html! macro accepts multiple root nodes directly. You do not need a fragment wrapper (<>...</>) at the root:

use yew::prelude::*;

html! {
    <div></div>
    <p></p>
};

Keyed fragments

The only legitimate use of fragment syntax is a keyed fragment.

use yew::prelude::*;

html! {
    // .. siblings ..
    <key="group-a">
        <span>{"a1"}</span>
        <span>{"a2"}</span>
    </>
    // .. siblings ..
};

Keyed fragments helps with reconciliation performance and node persistence in some cases.