You can even bind to properties inside an each block.

{#each todos as todo}
  <div class:done={todo.done}>
    <input
      type=checkbox
      bind:checked={todo.done}
    >

    <input
      placeholder="What needs to be done?"
      bind:value={todo.text}
    >
  </div>
{/each}

Note that interacting with these <input> elements will mutate the array. If you prefer to work with immutable data, you should avoid these bindings and use event handlers instead.