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<!DOCTYPE html>
<html>
<head>
<title>First React App</title>
<script crossorigin src="https://unpkg.com/react@16/umd/react.development.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@16/umd/react-dom.development.js"></script>
<script src='https://unpkg.com/babel-standalone@6/babel.min.js'></script>
</head>
<body>
<div id='app'></div>
<script>
window.API = {
fetchFriends() {
return new Promise((res, rej) => {
const friends = [
{
name: 'Jordyn',
active: true,
},
{
name: 'Mikenzi',
active: true,
},
{
name: 'Jake',
active: false
}
]
setTimeout(() => res(friends), 2000)
})
}
}
</script>
<script type='text/babel'>
class Loading extends React.Component {
constructor(props) {
super(props);
this.state = {
text: 'Loading'
};
}
componentDidMount() {
const stopper = this.state.text + '...';
this.interval = window.setInterval(() => {
this.state.text === stopper
? this.setState(() => ({ text: 'Loading' }))
: this.setState((prevState) => ({ text: prevState.text + '.' }))
}, 300)
}
componentWillUnmount() {
window.clearInterval(this.interval);
}
render() {
return (
<p>
{this.state.text}
</p>
)
}
}
function ActiveFriends (props) {
return (
<div>
<h2>Active Friends</h2>
<ul>
{props.list.map((friend) => (
<li key={friend.name}>
<span>{friend.name}</span>
<button onClick={() => props.onRemoveFriend(friend.name)}>Remove</button>
<button onClick={() => props.onToggleFriend(friend.name)}>Deactivate</button>
</li>
))}
</ul>
</div>
)
}
function InactiveFriends (props) {
return (
<div>
<h2>Inactive Friends</h2>
<ul>
{props.list.map((friend) => (
<li key={friend.name}>
<span>{friend.name}</span>
<button onClick={() => props.onToggleFriend(friend.name)}>Activate</button>
</li>
))}
</ul>
</div>
)
}
class App extends React.Component {
constructor(props) {
super(props)
this.state = {
friends: [],
input: '',
loading: true,
}
this.handleRemoveFriend = this.handleRemoveFriend.bind(this)
this.updateInput = this.updateInput.bind(this)
this.handleAddFriend = this.handleAddFriend.bind(this)
this.handleToggleFriend = this.handleToggleFriend.bind(this)
console.log('--constructor--')
}
componentDidMount() {
console.log('--componentDidMount--')
API.fetchFriends()
.then((friends) => {
this.setState({
friends,
loading: false,
})
})
}
componentDidUpdate() {
console.log('--componentDidUpdate--')
}
componentWillUnmount() {
console.log('--componentWillUnmount--')
}
handleAddFriend() {
this.setState((currentState) => {
return {
friends: currentState.friends.concat([{
name: this.state.input,
active: true
}]),
input: ''
}
})
}
handleRemoveFriend(name) {
this.setState((currentState) => {
return {
friends: currentState.friends.filter((friend) => friend.name !== name)
}
})
}
handleToggleFriend(name) {
this.setState((currentState) => {
const friend = currentState.friends.find((friend) => friend.name === name)
return {
friends: currentState.friends.filter((friend) => friend.name !== name)
.concat([{
name,
active: !friend.active
}])
}
})
}
updateInput(e) {
const value = e.target.value
this.setState({
input: value
})
}
render() {
console.log('--render--')
if (this.state.loading === true) {
return <Loading />
}
return (
<div>
<input
type='text'
placeholder='new friend'
value={this.state.input}
onChange={this.updateInput}
/>
<button onClick={this.handleAddFriend}>
Submit
</button>
<div>
<button onClick={() => this.setState({
friends: []
})}>Clear All</button>
</div>
<ActiveFriends
list={this.state.friends.filter((friend) => friend.active === true)}
onRemoveFriend={this.handleRemoveFriend}
onToggleFriend={this.handleToggleFriend}
/>
<InactiveFriends
list={this.state.friends.filter((friend) => friend.active === false)}
onToggleFriend={this.handleToggleFriend}
/>
</div>
)
}
}
ReactDOM.render(
<App />,
document.getElementById('app')
)
</script>
</body>
</html>
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