Copy Field

copy-field

Read-only field that shows a value with a copy button docked at its right edge: one click copies, and focusing or clicking anywhere in the field selects the whole value. Use it wherever a generated string is read once and copied — an API key or secret, an access token, a client ID and client secret, a database connection string, an invite or share link, a webhook or callback URL, a license key, recovery or backup codes, a referral code, a wallet address, an account, order or transaction ID, an ngrok or preview URL, the CLI command your onboarding tells the user to run. Select-on-focus is the part that matters and the part hand-rolled versions leave out: navigator.clipboard.writeText rejects on an insecure origin, inside a sandboxed iframe, or when the document is not focused, and a copy button that swallows that error leaves the user with a value they cannot get out of the box. Here the whole value is already selected, so Ctrl/Cmd+C works, and it is reachable from the keyboard because focus alone selects it. The button announces itself properly too — it composes pulld's copy-button, so its accessible name flips between "Copy to clipboard" and "Copied", a polite live region says "Copied" for a screen reader, the icon is aria-hidden, and the copied state reverts after a timeout you can set. The field renders in monospace so an O and a 0 are distinguishable, forwards a ref so you can focus it from a shortcut, and takes an aria-label (default "Copyable value"). Official shadcn/ui has no copy field: its input-group is an assembly kit of six parts (InputGroup, InputGroupAddon, InputGroupButton, InputGroupText, InputGroupInput, InputGroupTextarea) that pulls in button, input and textarea and contains no clipboard call, no read-only handling and no selection behaviour — you would be writing all of the above yourself. Two files, no npm dependencies, shadcn tokens, dark mode included.