Problems with syntax of React.js

Question

please help me in the code. i have a problem with getInitialState(), the code isn't work: enter image description here

the mistake is on the picture, but i can't see this.

Thank you very much, it's work now – John Smith Feb 18 '17 at 15:40 — John Smith, Feb 18 '17 at 15:40

score 4 · Accepted Answer · edited May 23 '17 at 11:54

4

You're using ES6 classes, which means you need to use a constructor to initialize the state:

class App extends Component {
    constructor(props) {
        super(props);
        this.state = {
            show: true
        };
    }

    // ..
}

Reference: What is the difference between using constructor vs getInitialState in React / React Native?

edited May 23 '17 at 11:54

Community

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answered Feb 17 '17 at 22:54

Bingo. Question, though: is there any reason not to just add state={show:true} to the class itself, rather than introducing the constructor? I've done it that way and it seems to work fine. – Joshua Engel Feb 17 '17 at 22:56
1

That should work fine, yes. But you might already have a constructor anyway, for instance to bind methods to `this` or the like. – Feb 17 '17 at 23:02
You can either initialize the state within the constructor, as shown in the answer, or just using the static property 'state' within the class itself, as mentioned in the previous comment. – nbkhope Feb 17 '17 at 23:49

Problems with syntax of React.js

1 Answers1