Chat

Contacts

Jane

Yesterday @ 2:30pm

Lorem, ipsum dolor sit amet consectetur adipisicing elit. Provident blanditiis quidem dolorum ab similique. Voluptatibus quibusdam unde mollitia corrupti assumenda libero. Quibusdam culpa illum unde asperiores accusantium! Unde, cupiditate tenetur.

Michael

Yesterday @ 2:45pm

Jane

Yesterday @ 2:50pm

Michael

Yesterday @ 2:52pm

<script lang="ts">
  import { SendIcon } from '@lucide/svelte';
  import { onMount } from 'svelte';

  // Types
  interface Person {
    id: number;
    avatar: number;
    name: string;
  }
  interface MessageFeed {
    id: number;
    host: boolean;
    avatar: number;
    name: string;
    timestamp: string;
    message: string;
    color: string;
  }

  let elemChat: HTMLElement;
  const lorem =
    'Lorem, ipsum dolor sit amet consectetur adipisicing elit. Provident blanditiis quidem dolorum ab similique. Voluptatibus quibusdam unde mollitia corrupti assumenda libero. Quibusdam culpa illum unde asperiores accusantium! Unde, cupiditate tenetur.';

  // Navigation List
  const people: Person[] = [
    { id: 0, avatar: 14, name: 'Michael' },
    { id: 1, avatar: 40, name: 'Janet' },
    { id: 2, avatar: 31, name: 'Susan' },
    { id: 3, avatar: 56, name: 'Joey' },
    { id: 4, avatar: 24, name: 'Lara' },
    { id: 5, avatar: 9, name: 'Melissa' },
  ];
  let currentPersonId: number = people[0].id;

  // Messages
  let messageFeed: MessageFeed[] = [
    {
      id: 0,
      host: true,
      avatar: 48,
      name: 'Jane',
      timestamp: 'Yesterday @ 2:30pm',
      message: lorem,
      color: 'preset-tonal-primary',
    },
    {
      id: 1,
      host: false,
      avatar: 14,
      name: 'Michael',
      timestamp: 'Yesterday @ 2:45pm',
      message: lorem,
      color: 'preset-tonal-primary',
    },
    {
      id: 2,
      host: true,
      avatar: 48,
      name: 'Jane',
      timestamp: 'Yesterday @ 2:50pm',
      message: lorem,
      color: 'preset-tonal-primary',
    },
    {
      id: 3,
      host: false,
      avatar: 14,
      name: 'Michael',
      timestamp: 'Yesterday @ 2:52pm',
      message: lorem,
      color: 'preset-tonal-primary',
    },
  ];
  let currentMessage = '';

  function scrollChatBottom(behavior?: 'auto' | 'instant' | 'smooth') {
    elemChat.scrollTo({ top: elemChat.scrollHeight, behavior });
  }

  function getCurrentTimestamp(): string {
    return new Date().toLocaleString('en-US', { hour: 'numeric', minute: 'numeric', hour12: true });
  }

  function addMessage() {
    const newMessage = {
      id: messageFeed.length,
      host: true,
      avatar: 48,
      name: 'Jane',
      timestamp: `Today @ ${getCurrentTimestamp()}`,
      message: currentMessage,
      color: 'preset-tonal-primary',
    };
    // Update the message feed
    messageFeed = [...messageFeed, newMessage];
    // Clear prompt
    currentMessage = '';
    // Smooth scroll to bottom
    // Timeout prevents race condition
    setTimeout(() => scrollChatBottom('smooth'), 0);
  }

  function onPromptKeydown(event: KeyboardEvent) {
    if (['Enter'].includes(event.code)) {
      event.preventDefault();
      addMessage();
    }
  }

  // When DOM is mounted, scroll to bottom
  onMount(() => {
    scrollChatBottom();
  });
</script>

<section class="card bg-surface-100-900 rounded-container overflow-hidden">
  <div class="chat w-full h-full grid grid-cols-1 lg:grid-cols-[30%_1fr]">
    <!-- Navigation -->
    <div class="hidden lg:grid grid-rows-[auto_1fr_auto] border-r-[1px] border-surface-200-800">
      <!-- Header -->
      <header class="border-b-[1px] border-surface-200-800 p-4">
        <input class="input" type="search" placeholder="Search..." />
      </header>
      <!-- List -->
      <div class="p-4 space-y-4 overflow-y-auto">
        <small class="opacity-50">Contacts</small>
        <div class="flex flex-col space-y-1">
          {#each people as person (person.id)}
            <button
              type="button"
              class="card p-2 w-full flex items-center space-x-4 {person.id === currentPersonId
                ? 'preset-filled-primary-500'
                : 'bg-surface-hover-token'}"
              onclick={() => (currentPersonId = person.id)}
            >
              <!-- <Avatar src="https://i.pravatar.cc/?img={person.avatar}" name={person.name} size="size-8" /> -->
              <span class="flex-1 text-start">
                {person.name}
              </span>
            </button>
          {/each}
        </div>
      </div>
      <!-- Footer -->
      <!-- <footer class="border-t-[1px] border-surface-200-800 p-4">(footer)</footer> -->
    </div>
    <!-- Chat -->
    <div class="grid grid-row-[1fr_auto]">
      <!-- Conversation -->
      <section bind:this={elemChat} class="max-h-[500px] p-4 overflow-y-auto space-y-4">
        {#each messageFeed as bubble (bubble.id)}
          {#if bubble.host === true}
            <div class="grid grid-cols-[auto_1fr] gap-2">
              <!-- <Avatar src="https://i.pravatar.cc/?img={bubble.avatar}" name={bubble.name} size="size-12" /> -->
              <div class="card p-4 preset-tonal rounded-tl-none space-y-2">
                <header class="flex justify-between items-center">
                  <p class="font-bold">{bubble.name}</p>
                  <small class="opacity-50">{bubble.timestamp}</small>
                </header>
                <p>{bubble.message}</p>
              </div>
            </div>
          {:else}
            <div class="grid grid-cols-[1fr_auto] gap-2">
              <div class="card p-4 rounded-tr-none space-y-2 {bubble.color}">
                <header class="flex justify-between items-center">
                  <p class="font-bold">{bubble.name}</p>
                  <small class="opacity-50">{bubble.timestamp}</small>
                </header>
                <p>{bubble.message}</p>
              </div>
              <!-- <Avatar src="https://i.pravatar.cc/?img={bubble.avatar}" name={bubble.name} size="size-12" /> -->
            </div>
          {/if}
        {/each}
      </section>
      <!-- Prompt -->
      <section class="border-t-[1px] border-surface-200-800 p-4">
        <div class="input-group grid-cols-[auto_1fr_auto] divide-x divide-surface-200-800 rounded-container-token">
          <button class="input-group-cell preset-tonal">+</button>
          <textarea
            value={currentMessage}
            oninput={(e) => (currentMessage = e.currentTarget.value)}
            class="bg-transparent border-0 ring-0"
            name="prompt"
            id="prompt"
            placeholder="Write a message..."
            rows="1"
            onkeydown={onPromptKeydown}
          ></textarea>
          <button class="input-group-cell {currentMessage ? 'preset-filled-primary-500' : 'preset-tonal'}" onclick={addMessage}>
            <SendIcon />
          </button>
        </div>
      </section>
    </div>
  </div>
</section>

Layout Columns

Use Tailwind’s grid column utility classes to define horizontal columns for your layout.

(nav)

(feed)

(online)

<!--
https://tailwindcss.com/docs/grid-template-columns#arbitrary-values
- auto: size to content widths
- 1fr: fill available space evenly
- {amount}: set fixed size (ex: 320px)
-->
<div class="w-full grid grid-cols-[auto_1fr_auto] gap-1">
  <div class="bg-surface-100-900 p-4">(nav)</div>
  <div class="bg-surface-100-900 p-4">(feed)</div>
  <div class="bg-surface-100-900 p-4">(online)</div>
</div>

Layout Rows

Use Tailwind’s grid row utility classes to define vertical layout rows for your layout.

(search)

(list)

(footer)

(feed)

Lorem, ipsum dolor sit amet consectetur adipisicing elit. Reprehenderit dolor ullam, qui et itaque quam distinctio dicta nostrum veritatis harum iure hic sequi aperiam, explicabo earum totam deserunt. Fugiat, temporibus.

(prompt)

<!--
https://tailwindcss.com/docs/grid-template-rows#arbitrary-values
- auto: size to content widths
- 1fr: fill available space evenly
- {amount}: set fixed size (ex: 320px)
-->
<div class="w-full grid grid-cols-2 gap-10">
  <!-- Three Row Layout -->
  <div class="h-full grid grid-rows-[auto_1fr_auto] gap-1">
    <div class="bg-surface-100-900 p-4">(search)</div>
    <div class="bg-surface-100-900 p-4">(list)</div>
    <div class="bg-surface-100-900 p-4">(footer)</div>
  </div>
  <!-- Two Row Layout -->
  <div class="h-full grid grid-rows-[1fr_auto] gap-1">
    <!-- We've set a max height here to trigger the vertical overflow. -->
    <!-- Removed max-h and space-y in your project. -->
    <div class="bg-surface-100-900 p-4 overflow-y-auto max-h-[128px] space-y-4">
      <p>(feed)</p>
      <p>
        Lorem, ipsum dolor sit amet consectetur adipisicing elit. Reprehenderit dolor ullam, qui et itaque quam distinctio dicta nostrum
        veritatis harum iure hic sequi aperiam, explicabo earum totam deserunt. Fugiat, temporibus.
      </p>
    </div>
    <div class="bg-surface-100-900 p-4">(prompt)</div>
  </div>
</div>

Message Feed

The feed simply loops through the available feed data. Each <pre> tag represents a single bubble element.

{
  "role": "host",
  "id": 0,
  "host": true,
  "avatar": 48,
  "name": "Jane",
  "timestamp": "Yesterday @ 2:30pm",
  "message": "Some message text.",
  "color": "variant-soft-primary"
}

{
  "role": "guest",
  "id": 1,
  "host": false,
  "avatar": 14,
  "name": "Michael",
  "timestamp": "Yesterday @ 2:45pm",
  "message": "Some message text.",
  "color": "variant-soft-primary"
}

---
let messageFeed = [
  {
    id: 0,
    host: true,
    avatar: 48,
    name: 'Jane',
    timestamp: 'Yesterday @ 2:30pm',
    message: 'Some message text.',
    color: 'variant-soft-primary',
  },
  {
    id: 1,
    host: false,
    avatar: 14,
    name: 'Michael',
    timestamp: 'Yesterday @ 2:45pm',
    message: 'Some message text.',
    color: 'variant-soft-primary',
  },
];
---

<section class="w-full max-h-[400px] overflow-y-auto space-y-4">
  <!-- Loop through the messageFeed array -->
  {
    messageFeed.map((bubble) => {
      // Determine if host/guest role
      const role = bubble.host === true ? 'host' : 'guest';
      // Render the bubble template
      return <pre class="pre">{JSON.stringify({ role, ...bubble }, null, 2)}</pre>;
    })
  }
</section>

Message Bubbles

Provide styling to each bubble element.

Jane

Yesterday @ 2:30pm

Some message text.

Michael

Yesterday @ 2:45pm

Some message text.

---
let messageFeed = [
  {
    id: 0,
    host: true,
    avatar: 48,
    name: 'Jane',
    timestamp: 'Yesterday @ 2:30pm',
    message: 'Some message text.',
    color: 'preset-tonal-primary',
  },
  {
    id: 1,
    host: false,
    avatar: 14,
    name: 'Michael',
    timestamp: 'Yesterday @ 2:45pm',
    message: 'Some message text.',
    color: 'preset-tonal-primary',
  },
];
---

<section class="w-full max-h-[400px] overflow-y-auto space-y-4">
  <!-- Loop through the messageFeed array -->
  {
    messageFeed.map((bubble) => {
      return (
        <>
          {/* If Host, else Guest */}
          {bubble.host ? (
            // Host Bubble
            <div class="grid grid-cols-[auto_1fr] gap-2">
              {/* <Avatar src={`https://i.pravatar.cc/?img=${bubble.avatar}`} name={bubble.name} size="size-12" /> */}
              <div class="card p-4 preset-tonal rounded-tl-none space-y-2">
                <header class="flex justify-between items-center">
                  <p class="font-bold">{bubble.name}</p>
                  <small class="opacity-50">{bubble.timestamp}</small>
                </header>
                <p>{bubble.message}</p>
              </div>
            </div>
          ) : (
            // Guest Bubble
            <div class="grid grid-cols-[1fr_auto] gap-2">
              <div class={`card p-4 rounded-tr-none space-y-2 ${bubble.color}`}>
                <header class="flex justify-between items-center">
                  <p class="font-bold">{bubble.name}</p>
                  <small class="opacity-50">{bubble.timestamp}</small>
                </header>
                <p>{bubble.message}</p>
              </div>
              {/* <Avatar src={`https://i.pravatar.cc/?img=${bubble.avatar}`} name={bubble.name} size="size-12" /> */}
            </div>
          )}
        </>
      );
    })
  }
</section>

Prompt

Use Skeleton’s input group styles to create a custom text prompt.

Scroll to Bottom

Bind your scrollable feed panel element reference (Svelte | React), then use scrollTo to scroll the panel to the bottom on demand. Scroll behavior can be set via behavior: 'smooth'.

function scrollChatBottom(behavior?: 'auto' | 'instant' | 'smooth' = 'smooth') {
  // `elemChat` represents our scrollable panel element
  elemChat.scrollTo({ top: elemChat.scrollHeight, behavior });
}

Add a Message

Below we’ll cover how to append the message feed with a new message from the host user. Per our above examples, we’ll use the same messageFeed data structure.

let messageFeed = [
  /* ...*/
];

Then bind to the textarea for your prompt in order to capture any message typed by the user.

tsx let elemPrompt: HTMLElement = useRef();

<textarea ref={elemPrompt} ... />

Here’s an example of how we might append a new message to the messageFeed array.

function addMessage(): void {
  const newMessage = {
    id: messageFeed.length,
    host: true,
    avatar: 48,
    name: 'Jane',
    timestamp: new date(),
    message: elemPrompt.value,
    color: 'preset-tonal-primary',
  };
  // Append the new message to the message feed
  messageFeed = [...messageFeed, newMessage];
  // Clear the textarea message
  elemPrompt.value = '';
  // Smoothly scroll to the bottom of the feed
  setTimeout(() => {
    scrollChatBottom('smooth');
  }, 0);
}

This can be triggered when the prompt’s SEND button is clicked.

<button ... onclick={addMessage}>Send</button>

Skeleton

catppuccin

cerberus

concord

crimson

fennec

hamlindigo

legacy

mint

modern

mona

nosh

nouveau

pine

reign

rocket

rose

sahara

seafoam

terminus

vintage

vox

wintry

Layout Columns

Layout Rows

Message Feed

Message Bubbles

Prompt

Scroll to Bottom

Add a Message