{#each section as {depth, title, lines}} <h{depth}>{title}</h{depth}> {#each lines as line} <p>{content}</p> {/each} {/each}

that feels a lot like directives in Marko: https://markojs.com/docs/syntax/#directives. While Marko did bring some interesting ideas to the table, I find Svelte's approach to be more concise and easier to reason about.