add svelte app.

webapp/src/components/Comment.svelte

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+<script>
+  import fromUnixTime from "date-fns/fromUnixTime";
+  import formatDistanceToNow from "date-fns/formatDistanceToNow";
+  export let story;
+  export let comment;
+  export let showComments = true;
+  export let dateString = formatDistanceToNow(fromUnixTime(comment.date), {
+    addSuffix: true,
+  });
+  const author = comment.author.replace(" ", "");
+  export let id = `${author}-${comment.date}`;
+
+  export function toggleComments() {
+    showComments = !showComments;
+  }
+</script>
+
+<style>
+  .comment-author {
+  }
+  .comment-text {
+    padding: 0 0.5rem;
+    color: #333;
+  }
+  .comment-children {
+    margin-left: 1rem;
+    padding-left: 1rem;
+    border-left: solid 1px #000;
+  }
+  .link-button {
+    background: none;
+    border: none;
+    padding: 0 0.1rem;
+    color: inherit;
+    cursor: pointer;
+  }
+</style>
+
+<div class="comment" id="comment-{id}">
+  <div class="comment-author">
+    {comment.author}
+    |
+    <a href="{story.id}#comment-{id}">{dateString}</a>
+    {#if comment.comments.length}
+      <button
+        class="link-button"
+        on:click={toggleComments}>[{showComments ? '-' : '+'}]</button>
+    {/if}
+  </div>
+  <div class="comment-text">
+    {@html comment.text}
+  </div>
+  {#if showComments && comment.comments.length}
+    <div class="comment-children">
+      {#each comment.comments as child}
+        <svelte:self {story} comment={child} />
+      {/each}
+    </div>
+  {/if}
+</div>

webapp/src/components/Nav.svelte

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+<script>
+  export let segment;
+</script>
+
+<style>
+  nav {
+    border-bottom: 1px solid rgba(255, 62, 0, 0.1);
+    font-weight: 300;
+    padding: 0 1em;
+  }
+
+  ul {
+    margin: 0;
+    padding: 0;
+  }
+
+  /* clearfix */
+  ul::after {
+    content: "";
+    display: block;
+    clear: both;
+  }
+
+  li {
+    display: block;
+    float: left;
+  }
+
+  [aria-current] {
+    position: relative;
+    display: inline-block;
+  }
+
+  [aria-current]::after {
+    position: absolute;
+    content: "";
+    width: calc(100% - 1em);
+    height: 2px;
+    background-color: rgb(255, 62, 0);
+    display: block;
+    bottom: -1px;
+  }
+
+  a {
+    text-decoration: none;
+    padding: 1em 0.5em;
+    display: block;
+  }
+</style>
+
+<nav>
+  <ul>
+    <li>
+      <a
+        aria-current={segment === undefined ? 'page' : undefined}
+        href=".">News</a>
+    </li>
+  </ul>
+</nav>

webapp/src/components/StoryInfo.svelte

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+<script>
+  import fromUnixTime from "date-fns/fromUnixTime";
+  import formatDistanceToNow from "date-fns/formatDistanceToNow";
+  export let story;
+
+  export let dateString = formatDistanceToNow(fromUnixTime(story.date), {
+    addSuffix: true,
+  });
+</script>
+
+<style>
+</style>
+
+<time
+  datetime={fromUnixTime(story.date).toISOString()}
+  title={fromUnixTime(story.date)}>{dateString}</time>
+{#if story.author && story.author_link}
+  by
+  <a href={story.author_link}>{story.author}</a>
+{:else if story.author}by {story.author}{/if}
+on
+{story.source}
+{#if story.score}&bull; {story.score} points{/if}
+{#if story.num_comments}
+  &bull;
+  <a rel="prefetch" href="/{story.id}#comments">{story.num_comments}
+    comments</a>
+{/if}