🔔 react-native-bell-chat

A library of React components for building chat UIs.

DEMO

Live demo

Features

• Chat like scroll behavior (eg. automatic scroll to bottom)
• Load more messages on scrolling to the top (with custom threshold)
• SUPER easy to use
• Customize anything
• Author avatars
• Last seen messages for each author
• Show if authors are typing or not
• Automatic date rows (when the following message is from a different date than the preceding one)

Keep in mind that this project is still in the early stages of development. If you encounter a bug or have a feature request, please create an issue.

Installation

npm install react-native-bell-chat --save

OR

yarn add react-native-bell-chat

Basic Usage

import { ChatFeed } from 'react-native-bell-chat'
 
// Your code stuff...
 
render() {
 
  return (
 
    // Your JSX...
 
    <ChatFeed
      messages={this.state.messages} // Array: list of message objects
      authors={this.state.authors} // Array: list of authors
      yourAuthorId={2} // Number: Your author id (corresponds with id from list of authors)
    />
 
    // Your JSX...
 
  )
 
}

The bare minimum is to provide a list of messages and authors, check this out for an example:

//...
this.state = {
  messages: [
    {
      id: 1,
      authorId: 1,
      message: "Sample message",
      createdOn: new Date(),
      isSend: true
    },
    {
      id: 2,
      authorId: 2,
      message: "Second sample message",
      createdOn: new Date(),
      isSend: false
    },
  ],
  authors: [
    {
      id: 1,
      name: 'Mark',
      isTyping: true,
      lastSeenMessageId: 1,
      bgImageUrl: undefined
    },
    {
      id: 2,
      name: 'Peter',
      isTyping: false,
      lastSeenMessageId: 2,
      bgImageUrl: undefined
    }
  ]
};
//...

Complete props for author:

typescript

export interface Author {
    id: number;
    name: string;
    avatarName?: string;
    lastSeenAvatarName?: string;
    isTyping?: boolean;
    lastSeenMessageId?: number;
    bgImageUrl?: number;
}

Complete props for message:

typescript

export interface Message {
  id?: number;
  authorId?: number; // If undefined, message is considered to be "System message"
  message: string;
  createdOn?: Date;
  isSend?: boolean;
}

API

Api is obtained as ref of the ChatFeed component. It's divided in 2 parts, feedApi and scrollApi. Ref gives you and object like this:

interface ChatFeedApi {
  onMessageSend: () => void; // Should be called when user sends a message (this scrolls the component down)
  scrollApi: ChatScrollAreaApi;
}

Where scroll api is

interface ChatScrollAreaApi {
  scrollToBottom: (behavior?: ScrollBehavior) => void;
  scrollTo: (top: number) => void;
  scrolledToBottom: () => boolean; // Check if we are scrolled to bottom
  scrolledToLoadThreshold: () => boolean; // Check if we are scrolled to threshold where we need to load messages
}

Whole list of properties

export interface ChatFeedProps {
  // Structural props
  className?: string;
 
  // Functional props
  messages: Message[];
  authors: Author[];
  yourAuthorId: number;
  hasOldMessages?: boolean;
  loadOldMessagesThreshold?: number;
 
  // Visual props
  bubblesCentered?: boolean;
  bubbleStyles?: ChatBubbleStyles;
  maxHeight?: string | number;
  minHeight?: string | number;
 
  // Switches
  showDateRow?: boolean;
  showRecipientAvatar?: boolean;
  showRecipientLastSeenMessage?: boolean;
  showIsTyping?: boolean;
  showLoadingMessages?: boolean;
 
  // Extra container styles for custom components
  showRecipientAvatarChatMessagesStyle?: React.CSSProperties;
  showRecipientLastSeenMessageChatMessagesStyle?: React.CSSProperties;
  showIsTypingChatMessagesStyle?: React.CSSProperties;
 
  // Custom components
  customLoadingMessages?: (props: LoadingMessagesProps) => JSX.Element;
  customChatBubble?: (props: ChatBubbleProps) => JSX.Element;
  customSystemChatBubble?: (props: ChatBubbleProps) => JSX.Element;
  customAvatar?: (props: AvatarProps) => JSX.Element;
  customScrollArea?: (props: ChatScrollAreaProps) => JSX.Element;
  customIsTyping?: (props: ChatScrollAreaProps) => JSX.Element;
  customLastSeenAvatar?: (props: LastSeenAvatarProps) => JSX.Element;
  customDateRow?: (props: DateRowProps) => JSX.Element;
 
  // Callbacks
  onLoadOldMessages?: () => Promise<void>; // Make sure to return promise that only resolves after state is updated.
 
  ref?: (api: ChatFeedApi) => void;
}

Custom components

Most of the UI is customizable via injecting custom components. These are pure components, the library injects props to them so that you can customize pretty much anything.

FAQ

Q: My chat is scrolling up/down automatically every time I use setState on parent component.

A: Make sure to provide const expressions for custom components. Not inline functions.

Contributing 🔧

Contributions are always welcomed and encouraged.

Development

npm run start

Acknowledgments

This lib started as a fork from https://github.com/brandonmowat/react-chat-ui