Seems like just an ad for Svelte, and fairly FUD-ish on that. React will warn you by default when doing that exact example, asking you to provide a key to the `

Seems like just an ad for Svelte, and fairly FUD-ish on that. React will warn you by default when doing that exact example, asking you to provide a key to the `<li>` to avoid re-rendering it unnecesarily. Instead, this states "Unless you're unhealthily obsessed with performance, you're not going to optimise that."