Want to set initial state from api in React? You should call this.setState in order to change state values:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | export default class IndexPage extends React.Component { constructor() { super(); this.state = { jsonReturnedValue: null } } componentDidMount() { fetch('https://localhost:3000/api/aye') .then(response => response.json()) .then(json => { this.setState({ jsonReturnedValue: json }); }); } render() { return ( <div> <h1>{ this.state.jsonReturnedValue }</h1> </div> ); } } |
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