Why Use Forwarding Refs in React?

React’s ref forwarding is a powerful feature that allows components to take a ref they receive and pass it further down to a child component. This article explores why developers should use forwarding refs, focusing on its role in accessing underlying DOM nodes, building highly reusable component libraries, and managing focus, selection, or animations in deeply nested components.

Accessing Child DOM Nodes

In standard React data flow, props are the only way parent components interact with their children. However, there are cases where you need to imperatively modify a child component—such as focusing an input, measuring its size, or triggering an animation.

Normally, you cannot pass a ref to a functional component because functional components do not have instances. If you attempt to pass a ref to a standard custom component, React will output a warning, and the ref will remain null. Forwarding refs solves this problem by explicitly allowing a component to intercept a ref and hand it over to one of its DOM children.

Building Reusable Component Libraries

Ref forwarding is essential for developers building design systems or reusable UI component libraries. High-quality UI components like custom buttons, text inputs, and modals should behave as closely to native DOM elements as possible.

If a developer using your library needs to focus a custom button programmatically, they expect to attach a ref directly to your <MyButton /> component. By using React.forwardRef, you ensure that the consumer of your component gets direct access to the underlying native HTML element, preserving the natural expectations of standard HTML elements.

import React from 'react';

const CustomInput = React.forwardRef((props, ref) => (
  <input ref={ref} className="custom-input-style" {...props} />
));

export default CustomInput;

In this example, any parent component that renders <CustomInput ref={inputRef} /> will receive direct access to the actual <input> element in the DOM, rather than the wrapper component.

Integrating with Third-Party Libraries

When integrating React applications with non-React libraries (such as charting tools, D3, or animation engines like GreenSock), direct DOM access is mandatory. These libraries need to target specific DOM containers to render their outputs. Ref forwarding acts as a bridge, allowing your clean, componentized React tree to safely expose the necessary DOM nodes to legacy or imperative third-party tools.

Enhancing HOCs (Higher-Order Components)

Higher-Order Components (HOCs) wrap an existing component to add additional logic or styling. However, when you attach a ref to a component wrapped in an HOC, the ref points to the outer container component rather than the wrapped component.

By using React.forwardRef inside the HOC, you can explicitly forward the ref through the wrapper to the inner wrapped component. This prevents the HOC from breaking the behavior of refs for any developer using the wrapped component.