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.

Never post code as image.

user5734311
– user5734311

2017-02-17 22:55:54 +00:00
Commented Feb 17, 2017 at 22:55 — user5734311
– user5734311, Commented Feb 17, 2017 at 22:55
Thank you very much, it's work now

John Smith
– John Smith

2017-02-18 15:40:22 +00:00
Commented Feb 18, 2017 at 15:40 — John Smith
– John Smith, Commented Feb 18, 2017 at 15:40

Community · Accepted Answer · 2017-05-23 11:54:18Z

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, 2017 at 11:54

CommunityBot

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answered Feb 17, 2017 at 22:54

user5734311

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3 Comments

Joshua Engel Over a year ago

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.

user5734311 Over a year ago

That should work fine, yes. But you might already have a constructor anyway, for instance to bind methods to this or the like.

nbkhope Over a year ago

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.

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