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Character Counter Input Group (Textarea) for Svelte

A message textarea with a fixed 0/500 in a footer row, and typing stops at 500 characters.

UI library: Ark UI

A message box has a footer under the text, with a line between them. The footer shows 0/500 at its end. The count does not change while someone types. The textarea stops at 500 characters.

Use it for a comment that must stay under 500 characters. A single-line cap fits an Input better. In Svelte, Ark UI does not recount 0/500 while someone types.

Preview

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Installation

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Anatomy

Input Group anatomy: root, addon, input, text, button

Usage

<InputGroup class="w-full max-w-sm bg-background"><InputGroupTextarea aria-label="Message" class="min-h-[120px]" maxlength={500} placeholder="Enter your message..." /><InputGroupAddon align="block-end" class="border-t"><InputGroupText class="ms-auto">0/500</InputGroupText></InputGroupAddon></InputGroup>

FAQ

How is the footer row built?

An InputGroupAddon with align="block-end" and border-t, after the textarea. ms-auto on the count pushes it to the end.

What stops typing at 500?

maxLength={500} on InputGroupTextarea.

Does 0/500 count characters?

No, it's fixed text. Keep the value in state and render its length.

How tall is the textarea?

At least 120 pixels from min-h-[120px], growing with its content.

Is the count announced?

Only if you tie it in with aria-describedby on the textarea.

How is the textarea labeled?

aria-label="Message".

API Reference

Input Group

Sets aria-label="Message", maxlength={500}, placeholder="Enter your message..." and align="block-end". The rest is on the Input Group page.

All 39 input group examples