chat-ui / src /lib /components /TokensCounter.svelte
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nsarrazin HF staff
Use jinja template for chat formatting (#730) (#744)
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<script lang="ts">
import type { Model } from "$lib/types/Model";
import { getTokenizer } from "$lib/utils/getTokenizer";
import type { PreTrainedTokenizer } from "@xenova/transformers";
export let classNames = "";
export let prompt = "";
export let modelTokenizer: Exclude<Model["tokenizer"], undefined>;
export let truncate: number | undefined = undefined;
let tokenizer: PreTrainedTokenizer | undefined = undefined;
async function tokenizeText(_prompt: string) {
if (!tokenizer) {
return;
}
const { input_ids } = await tokenizer(_prompt);
return input_ids.size;
}
$: (async () => {
tokenizer = await getTokenizer(modelTokenizer);
})();
</script>
{#if tokenizer}
{#await tokenizeText(prompt) then nTokens}
{@const exceedLimit = nTokens > (truncate || Infinity)}
<div class={classNames}>
<p
class="peer text-sm {exceedLimit
? 'text-red-500 opacity-100'
: 'opacity-60 hover:opacity-90'}"
>
{nTokens}{truncate ? `/${truncate}` : ""}
</p>
<div
class="invisible absolute -top-6 right-0 whitespace-nowrap rounded bg-black px-1 text-sm text-white peer-hover:visible"
>
Tokens usage
</div>
</div>
{/await}
{/if}