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April 10, 2018 22:12
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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 type='text/babel'> | |
function FriendsList (props) { | |
return ( | |
<ul> | |
{props.list.map((name) => ( | |
<li key={name}> | |
<span>{name}</span> | |
<button onClick={() => props.onRemoveFriend(name)}>X</button> | |
</li> | |
))} | |
</ul> | |
) | |
} | |
class App extends React.Component { | |
constructor(props) { | |
super(props) | |
this.state = { | |
friends: ['Jordyn', 'Mikenzi', 'Jake'], | |
input: '', | |
} | |
this.handleRemoveFriend = this.handleRemoveFriend.bind(this) | |
this.updateInput = this.updateInput.bind(this) | |
this.handleAddFriend = this.handleAddFriend.bind(this) | |
} | |
handleAddFriend() { | |
this.setState((currentState) => { | |
return { | |
friends: currentState.friends.concat([this.state.input]), | |
input: '' | |
} | |
}) | |
} | |
handleRemoveFriend(name) { | |
this.setState((currentState) => { | |
return { | |
friends: currentState.friends.filter((friend) => friend !== name) | |
} | |
}) | |
} | |
updateInput(e) { | |
const value = e.target.value | |
this.setState({ | |
input: value | |
}) | |
} | |
render() { | |
return ( | |
<div> | |
<input | |
type='text' | |
placeholder='new friend' | |
value={this.state.input} | |
onChange={this.updateInput} | |
/> | |
<button onClick={this.handleAddFriend}> | |
Submit | |
</button> | |
<FriendsList | |
list={this.state.friends} | |
onRemoveFriend={this.handleRemoveFriend} | |
/> | |
</div> | |
) | |
} | |
} | |
ReactDOM.render( | |
<App />, | |
document.getElementById('app') | |
) | |
</script> | |
</body> | |
</html> |
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