git clone https://github.com/xcarpentier/gifted-chat-web-demo.git
cd gifted-chat-web-demo
npm i
npm run start

./node_modules/react-native-typing-animation/src/index.js
SyntaxError: /node_modules/react-native-typing-animation/src/index.js: Support for the experimental syntax 'jsx' isn't currently enabled (37:7):

  35 | 
  36 |     return (
> 37 |       <View style={[styles.container, style]}>
     |       ^
  38 |         <Dot x={dotX - dotRadius - dotMargin} y={this.state.y1} radius={dotRadius} style={dotStyles} dotColor={dotColor} />
  39 |         <Dot x={dotX} y={this.state.y2} radius={dotRadius} style={dotStyles} dotColor={dotColor} />
  40 |         <Dot x={dotX + dotRadius + dotMargin} y={this.state.y3} radius={dotRadius} style={dotStyles} dotColor={dotColor} />

Add @babel/preset-react (https://git.io/JfeDR) to the 'presets' section of your Babel config to enable transformation.
If you want to leave it as-is, add @babel/plugin-syntax-jsx (https://git.io/vb4yA) to the 'plugins' section to enable parsing.

    1 | import React, { useState } from 'react'
  > 2 | import { GiftedChat, IMessage, User } from 'react-native-gifted-chat'
      |                      ^
    3 | import { View, Dimensions } from 'react-native'
    4 | import './App.css'