chat-ui / src /lib /components /chat /ChatMessages.svelte
Adrien Denat
Polyfill safari 14 (#149)
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<script lang="ts">
import type { Message } from "$lib/types/Message";
import { snapScrollToBottom } from "$lib/actions/snapScrollToBottom";
import ScrollToBottomBtn from "$lib/components/ScrollToBottomBtn.svelte";
import { createEventDispatcher, tick } from "svelte";
import ChatIntroduction from "./ChatIntroduction.svelte";
import ChatMessage from "./ChatMessage.svelte";
import { randomUUID } from "$lib/utils/randomUuid";
const dispatch = createEventDispatcher<{ retry: { id: Message["id"]; content: string } }>();
export let messages: Message[];
export let loading: boolean;
export let pending: boolean;
let chatContainer: HTMLElement;
async function scrollToBottom() {
await tick();
chatContainer.scrollTop = chatContainer.scrollHeight;
}
// If last message is from user, scroll to bottom
$: if (messages[messages.length - 1]?.from === "user") {
scrollToBottom();
}
</script>
<div
class="scrollbar-custom mr-1 h-full overflow-y-auto"
use:snapScrollToBottom={messages.length ? messages : false}
bind:this={chatContainer}
>
<div class="mx-auto flex h-full max-w-3xl flex-col gap-5 px-5 pt-6 sm:gap-8 xl:max-w-4xl">
{#each messages as message, i}
<ChatMessage
loading={loading && i === messages.length - 1}
{message}
on:retry={() => dispatch("retry", { id: message.id, content: message.content })}
/>
{:else}
<ChatIntroduction on:message />
{/each}
{#if pending}
<ChatMessage message={{ from: "assistant", content: "", id: randomUUID() }} />
{/if}
<div class="h-32 flex-none" />
</div>
<ScrollToBottomBtn
class="bottom-36 right-4 max-md:hidden lg:right-10"
scrollNode={chatContainer}
/>
</div>