I can’t see what is going wrong here, perhaps someone else can. I am getting an error of : Cannot read property ‘toString’ of undefined.
class Dialog extends React.Component {
constructor(props) {
super(props);
}
componentWillUpdate() {
console.log('Component is about to update...');
}
// change code below this line
componentWillReceiveProps(nextProps){
console.log(this.props, nextProps);
}
conponentDidUpdate(){
console.log("Component has updated");
}
// change code above this line
render() {
return <h1>{this.props.message}</h1>
}
};
class Controller extends React.Component {
constructor(props) {
super(props);
this.state = {
message: 'First Message'
};
this.changeMessage = this.changeMessage.bind(this);
}
changeMessage() {
this.setState({
message: 'Second Message'
});
}
render() {
return (
<div>
<button onClick={this.changeMessage}>Update</button>
<Dialog message={this.state.message}/>
</div>
);
}
};
Your browser information:
User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36
.
Link to the challenge:
https://learn.freecodecamp.org/front-end-libraries/react/manage-updates-with-lifecycle-methods