PureComponent.jsx

class Pagination extends PureComponent {
	...
}

class WrongPage extends Component {
	render() {
		return (
			...
			<Pagination title={<h5>test</h5>} />
			...
		);
	}
}

const title = <h5>test</h5>;
class RightPage extends Component {
	render() {
		return (
			...
			<Pagination title={title} />
			...
		);
	}
}