` DOM node is added to the screen, React will call your `ref` callback with the DOM `node` as the argument. When that `
` DOM node is removed, React will call the cleanup function returned from the callback.
-React will also call your `ref` callback whenever you pass a *different* `ref` callback. In the above example, `(node) => { ... }` is a different function on every render. When your component re-renders, the *previous* function will be called with `null` as the argument, and the *next* function will be called with the DOM node.
+React will also call your `ref` callback whenever you pass a *different* `ref` callback. In the above example, `(node) => { ... }` is a different function on every render. When your component re-renders, the cleanup function returned by the *previous* function will be called, and the *next* function will be called with the DOM node. If no cleanup function is returned, the *previous* function will be called with `null` as the argument instead.
#### Parameters {/*ref-callback-parameters*/}
diff --git a/src/content/reference/react-dom/components/form.md b/src/content/reference/react-dom/components/form.md
index 10e9c6794..459c27e0b 100644
--- a/src/content/reference/react-dom/components/form.md
+++ b/src/content/reference/react-dom/components/form.md
@@ -38,21 +38,27 @@ To create interactive controls for submitting information, render the [built-in
`