Why is shouldComponentUpdate called?

Question

JavaScript

There are two components.
In the first I change the state -> in the second, shouldComponentUpdate is called.
Shouldn't this be happening?
Maybe this is due to the use of es6, in one and the other component

constructor(props) {
        super(props);
        this.state = {
            select: false
        };
    }

Thanks

Answer 1

You didn't provide code, but shouldComponentUpdate is called before the renderer. When you change the state of the parent component, it is re-rendered, which means that all child components also go to the re-render.