How to access the child element in React when defining a class?

Question

JavaScript

<li className={this.setActive('/categories')}>
    <a href={'/categories'}>Категории</a>
</li>

When setting the class, it is necessary to get access to the element to which the class is set, how to do this?

Answer 1

React.createRef can be used
https://reactjs.org/docs/refs-and-the-dom.html#cre...