Where to initialize the state of a React component?

Question

React

So, what's the difference between these options?

class C extends ReactComponent{
    constructor(props){
        super(props);
        this.state = {
            isAnimal: true
        }
    }
    render(......)
}

class C extends ReactComponent{
    state = {
        isAnimal: true
    }
    render(........)
}

Answer 1

In the first one, you have access to `props` and `context` (constructor arguments).
The second, yet unstandardized "sugar" to the first, but without `props` and `context`.

Answer 2

The second option won't work without babel-plugin-transform-class-properties .