# Comment thread A React component in [Beamline](https://beamline.io/)'s [Content & display](https://beamline.io/components/display) category. Live demo: https://beamline.io/components/comment-thread A discussion attached to something: replies, reactions, @mentions, editing and deleting your own, resolve that folds the thread. ## Use it for - Comments on a record, a chart, a document. ## Not for - Real-time chat ([chat-thread](https://beamline.io/components/chat-thread)). ## Anatomy - header (title, count, resolve) - comment (avatar, name, time, body with mentions, reactions, reply) - replies - composer (mention input) ## States - open - resolved - replying - editing own ## Keyboard - ⌘Enter sends - Escape cancels a reply - your comment edits in place ## Motion A new comment or reply grows in and the thread makes room; a deleted one fades where it stood (useFlip). Reduced motion places at once. ## Props | Prop | Type | Default | Description | | --- | --- | --- | --- | | `comments / defaultComments / onCommentsChange` | `ThreadComment[] / (list, event) => void` | — | | | `currentUser / people` | `{ id, name, avatar? }` | — | | | `resolved / defaultResolved / onResolvedChange` | `boolean` | — | | | `reactions / maxDepth / placeholder / nowLabel` | `mixed` | — | | | `classNames` | `CommentThreadClassNames` | — | | | `style / ref` | `CSSProperties / native Ref` | — | | ## Dependencies `lucide-react` ## Import ```tsx import { CommentThread } from "@/components/comment-thread/comment-thread"; ``` ## Get it Comment thread is part of Beamline: 190 React components and screens your coding agent (Claude Code, Codex, Cursor or any MCP client) installs into your app through Beamline's MCP server, as a ready-built package or as plain React source you can change. $49 one payment (regular $200), no subscription, a year of updates, one licence for your whole team. [Get Beamline](https://beamline.io/checkout?pack=complete) · [Connect your agent](https://beamline.io/connect) ## More in Content & display - [Advertisement](https://beamline.io/components/advertisement): A sponsor or promo slot that turns through its ads on a hairline that fills; hovering or focusing holds the current ad. - [Avatar](https://beamline.io/components/avatar): A person or account in a small space: a photo, or initials on the hue their name always gets; presence dot; circle for people, square for companies. - [Avatar group](https://beamline.io/components/avatar-group): A team in a small space: overlapping faces that name themselves on hover or focus, and “+N” naming the rest. - [Badge](https://beamline.io/components/badge): A short status, category or count label: six tones, an icon or a status dot, two sizes. - [Code block](https://beamline.io/components/code-block): Code to read and copy: highlighted in the system's colours, numbered, marked lines, long files folded behind “Show all”. - [File diff](https://beamline.io/components/file-diff): A change to one file as a unified diff: line numbers, tinted lines, only the changed words marked, long unchanged stretches folded; give rows or just… - [Image compare](https://beamline.io/components/image-compare): Two images in one frame with a divider: drag anywhere, or arrow keys on the handle; horizontal or vertical, with captions. - [Item](https://beamline.io/components/item): The generic list row: media, title, description, meta and trailing actions; becomes a link or button when interactive. - [Kbd](https://beamline.io/components/kbd): Keyboard keys as keycaps; `mod` resolves to ⌘ or Ctrl per platform, symbols are spoken as words. - [Lightbox](https://beamline.io/components/lightbox): A full-screen image viewer: a thumbnail grows into it and shrinks back, arrows and ←/→ step through the set, Esc or a downward drag closes it. - [Logo Carousel](https://beamline.io/components/logo-carousel): A wall of logos shown a few at a time: every few seconds the slots turn left to right, each logo leaving upward as the next rises in. - [Marker](https://beamline.io/components/marker): A labelled point in a stream: a status event with an icon between messages, or a label such as "Today" between two hairlines. - [QR Code](https://beamline.io/components/qr-code): A scannable code set as gradient dots with rounded finder rings and an optional centre mark; a new value ripples out from the centre. - [Slot text](https://beamline.io/components/slot-text): Text and numbers that roll into their new value on reels, digit by digit from the right; other characters fade. 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