componentDidUpdate Changed Props

changed-props.js

class MyComponent extends React.Component {
	// ...
	
	componentDidUpdate( prevProps ) {
		for ( const key of Object.keys( this.props ) ) {
			if ( this.props[ key ] !== prevProps[ key ] ) {
				console.log(
					key,
					`(Before: ${ prevProps[ key ] })`,
					`(After: ${ this.props[ key ] })`
				);
			}
		}
	}
	
	// ...
}