Miranda Limonczenko f09d35cfd5 fix(docs): make code blocks reachable and readable by keyboard and screen reader (#49562)
Closes DOCS-1283



https://github.com/user-attachments/assets/6e55a27f-6f73-453b-b98f-e91d3c14a9e4



## Problem

Three defects in the docs code block:

- The scroll container has no `tabindex`. On `/guides/database/tables`,
18 blocks, none focusable, 2 overflowing at 1280px. Tab skips the scroll
region, so a keyboard-only user cannot scroll code that runs off the
edge.
- The container has `role="group"` with no accessible name, so it
announces as bare "group".
- The line-number gutter has no `aria-hidden`, so digits are read inline
with the code. A block linearizes as `1import { createClient } from
'@supabase/supabase-js'23const supabase = ...`, with lines 2 and 3
collapsing into "23".

Four more surfaced while testing the fix:

- The wrap and copy buttons were absolutely positioned inside the
element that scrolls, so `right-2` measured against the scrollable
content box. Scrolling dragged them out of the corner into the middle of
the code. This one predates the PR.
- The buttons preceded the code in the DOM, so a screen reader read two
actions before naming what they act on.
- `focus-within` only fired for the buttons, so focusing the block left
the controls invisible.
- Both buttons set an `aria-label` identical to their tooltip text, and
Radix points `aria-describedby` at the tooltip on focus, producing "Copy
code, button, Copy code".

## Solution

Keyboard:

- Split the scroll region out of the positioning container, so the
controls stay pinned.
- Give the scroll region a `tabIndex` and a focus ring.
- Reveal the controls on `group-focus-within`.

Screen reader:

- Name the region `<language>, <n> lines`. Code content stays readable;
the summary goes in the name so the group can be skipped or stepped
into.
- Map fence aliases to spoken names, so `ts` announces as TypeScript.
Only the ambiguous ones; `bash`, `python`, `kotlin`, `dart`, `swift`
already read fine.
- `aria-hidden` the gutter. The numbers are already `select-none`, and
copy takes its content from the source string rather than the DOM, so
copy behavior is unchanged.
- Order the controls after the code.
- Announce the word wrap toggle through a live region, matching the copy
button.
- Opt both buttons out of Radix's generated description.

Also moved the `data-wrapped` side effect out of the `setIsWrapped`
updater, since React calls updaters twice under StrictMode.

## Manual testing

1. Open `/docs/guides/database/tables`.
2. Run `document.querySelectorAll('.code-scroll[tabindex="0"]').length`
in the console. Expect `18`.
3. Run `[...document.querySelectorAll('.code-scroll')].map(b =>
b.getAttribute('aria-label'))`. Expect entries like `SQL, 11 lines` and
`bash, 2 lines`, plus one bare `2 lines` for the fence with no language.
4. Tab to a code block. Expect a visible focus ring, and the wrap and
copy buttons to appear.
5. Press ArrowRight on the block under "Basic data loading", which
overflows. Expect it to scroll, and the buttons to stay in the top-right
corner.
6. Press Enter on the wrap button. Expect the code to wrap and a screen
reader to announce "Word wrap enabled".
7. With VoiceOver on, focus a code block. Expect "SQL, 11 lines, code
block", then the code read without line numbers interleaved. Focus each
button and expect its name once, not twice.


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **Accessibility**
- Improved code block labels for screen readers, including programming
language and line count.
  - Added announcements when word wrap is enabled or disabled.
  - Enhanced keyboard focus behavior for code block controls.

- **Usability**
  - Kept code block controls visible while scrolling through code.
  - Improved wrapped-code overflow handling.
- Removed redundant tooltip descriptions for copy and word-wrap
controls.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->
2026-08-26 10:43:40 -07:00
2026-08-24 10:06:36 -06:00
2025-06-17 11:08:46 +02:00
2026-06-30 14:03:40 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00

Supabase

Supabase is the Postgres development platform. We're building the features of Firebase using enterprise-grade open source tools.

  • Hosted Postgres Database. Docs
  • Authentication and Authorization. Docs
  • Auto-generated APIs.
  • Functions.
    • Database Functions. Docs
    • Edge Functions Docs
  • File Storage. Docs
  • AI + Vector/Embeddings Toolkit. Docs
  • Dashboard

Supabase Dashboard

Watch "releases" of this repo to get notified of major updates.

Watch this repo

Documentation

For full documentation, visit supabase.com/docs

To see how to Contribute, visit Getting Started

Community & Support

  • Community Forum. Best for: help with building, discussion about database best practices.
  • GitHub Issues. Best for: bugs and errors you encounter using Supabase.
  • Email Support. Best for: problems with your database or infrastructure.
  • Discord. Best for: sharing your applications and hanging out with the community.

How it works

Supabase is a combination of open source tools. We’re building the features of Firebase using enterprise-grade, open source products. If the tools and communities exist, with an MIT, Apache 2, or equivalent open license, we will use and support that tool. If the tool doesn't exist, we build and open source it ourselves. Supabase is not a 1-to-1 mapping of Firebase. Our aim is to give developers a Firebase-like developer experience using open source tools.

Architecture

Supabase is a hosted platform. You can sign up and start using Supabase without installing anything. You can also self-host and develop locally.

Architecture

  • Postgres is an object-relational database system with over 30 years of active development that has earned it a strong reputation for reliability, feature robustness, and performance.
  • Realtime is an Elixir server that allows you to listen to PostgreSQL inserts, updates, and deletes using websockets. Realtime polls Postgres' built-in replication functionality for database changes, converts changes to JSON, then broadcasts the JSON over websockets to authorized clients.
  • PostgREST is a web server that turns your PostgreSQL database directly into a RESTful API.
  • GoTrue is a JWT-based authentication API that simplifies user sign-ups, logins, and session management in your applications.
  • Storage a RESTful API for managing files in S3, with Postgres handling permissions.
  • pg_graphql a PostgreSQL extension that exposes a GraphQL API.
  • postgres-meta is a RESTful API for managing your Postgres, allowing you to fetch tables, add roles, and run queries, etc.
  • Envoy is a cloud-native, high-performance edge and service proxy.

Client libraries

Our approach for client libraries is modular. Each sub-library is a standalone implementation for a single external system. This is one of the ways we support existing tools.

Language Client Feature-Clients (bundled in Supabase client)
Supabase PostgREST GoTrue Realtime Storage Functions
⚡️ Official ⚡️
JavaScript (TypeScript) supabase-js postgrest-js auth-js realtime-js storage-js functions-js
Flutter supabase-flutter postgrest-dart gotrue-dart realtime-dart storage-dart functions-dart
Swift supabase-swift postgrest-swift auth-swift realtime-swift storage-swift functions-swift
Python supabase-py postgrest-py gotrue-py realtime-py storage-py functions-py
💚 Community 💚
C# supabase-csharp postgrest-csharp gotrue-csharp realtime-csharp storage-csharp functions-csharp
Go - postgrest-go gotrue-go - storage-go functions-go
Java - - gotrue-java - storage-java -
Kotlin supabase-kt postgrest-kt auth-kt realtime-kt storage-kt functions-kt
Ruby supabase-rb postgrest-rb - - - -
Rust - postgrest-rs - - - -
Godot Engine (GDScript) supabase-gdscript - - - - -

Badges

Made with Supabase

[![Made with Supabase](https://supabase.com/badge-made-with-supabase.svg)](https://supabase.com)
<a href="https://supabase.com">
  <img
    width="168"
    height="30"
    src="https://supabase.com/badge-made-with-supabase.svg"
    alt="Made with Supabase"
  />
</a>

Made with Supabase (dark)

[![Made with Supabase](https://supabase.com/badge-made-with-supabase-dark.svg)](https://supabase.com)
<a href="https://supabase.com">
  <img
    width="168"
    height="30"
    src="https://supabase.com/badge-made-with-supabase-dark.svg"
    alt="Made with Supabase"
  />
</a>

Translations

Languages
TypeScript 59.3%
MDX 21.5%
JavaScript 17.9%
CSS 0.6%
Shell 0.4%
Other 0.2%