Hi Campers!
I’ve done all the Redux and React-Redux challenges twice, and now I want to make sure I know how to use it in CodePen…
I have these CodePen settings
JavaScript Preprocessor: Babel
External Scripts/Libraries:
- React
- ReactDOM
- Redux
I copied this entire code, which passed the final FCC React-Redux challenge (spoiler alert), into CodePen
// Redux:
const ADD = 'ADD';
const addMessage = (message) => {
return {
type: ADD,
message: message
}
};
const messageReducer = (state = [], action) => {
switch (action.type) {
case ADD:
return [
...state,
action.message
];
default:
return state;
}
};
const store = Redux.createStore(messageReducer);
// React:
const Provider = ReactRedux.Provider;
const connect = ReactRedux.connect;
// Change code below this line
class Presentational extends React.Component {
constructor(props) {
super(props);
this.state = {
input: ''
}
this.handleChange = this.handleChange.bind(this);
this.submitMessage = this.submitMessage.bind(this);
}
handleChange(event) {
this.setState({
input: event.target.value
});
}
submitMessage() {
this.props.submitNewMessage(this.state.input);
this.setState({
input: ''
});
}
render() {
return (
<div>
<h2>Type in a new Message:</h2>
<input
value={this.state.input}
onChange={this.handleChange}/><br/>
<button onClick={this.submitMessage}>Submit</button>
<ul>
{this.props.messages.map( (message, idx) => {
return (
<li key={idx}>{message}</li>
)
})
}
</ul>
</div>
);
}
};
// Change code above this line
const mapStateToProps = (state) => {
return {messages: state}
};
const mapDispatchToProps = (dispatch) => {
return {
submitNewMessage: (message) => {
dispatch(addMessage(message))
}
}
};
const Container = connect(mapStateToProps, mapDispatchToProps)(Presentational);
class AppWrapper extends React.Component {
render() {
return (
<Provider store={store}>
<Container/>
</Provider>
);
}
};
Then I added:
ReactDOM.render(<Provider/>, document.getElementById('challenge-node'));
at the bottom of the JS, and
<div id="challenge-node"></div>
in the HTML.
But nothing shows up in the preview screen on my pen. What am I missing?
Thanks!
jan