How to stop Render when new props are received?

Question

JavaScript

Can't figure out componentWillReceiveProps still renders.
And I need to catch the condition so as not to call render

Answer 1

You need to use the method
of i.e. your case

shouldComponentUpdate(nextProps, nextState) {
    if (this.props.a != nextProps.a) {
        return false
    } else {
        return true
    }
}

or shorter

shouldComponentUpdate(nextProps) {
    return this.props.a !== nextProps.a;
}

by default in all React.Components shouldComponentUpdate returns true.
More details: https://facebook.github.io/react/docs/component-sp...