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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/chat-application-design/message-composer

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$ curl repovive.com/roadmaps/frontend-system-design-interview-prep/chat-application-design/message-composer

Repovive

Message Composer - Chat Application Design | Frontend System Design Interview Prep | Repovive

Repovive.

Frontend System Design Interview Prep17 sections · 206 units12h total

Open in Course

Message Composer

Input handling

The composer handles text, media, and attachments.

Features:

Auto-expanding textarea
Emoji picker
File attachment
Paste image support
Send on Enter (Shift+Enter for newline)

Component structure:

MessageComposer
├── AttachmentPreview
├── TextArea
├── EmojiButton
├── AttachButton
└── SendButton

State:

{ text: '', attachments: [], isSending: false }

Accessibility: Label all buttons. Support keyboard submission.