diff --git a/content/docs/refs-and-the-dom.md b/content/docs/refs-and-the-dom.md
index c18fa0104ea..ca8e52c9e49 100644
--- a/content/docs/refs-and-the-dom.md
+++ b/content/docs/refs-and-the-dom.md
@@ -66,7 +66,7 @@ class CustomTextInput extends React.Component {
 }
 ```
 
-React will call the `ref` callback with the DOM element when the component mounts, and call it with `null` when it unmounts.
+React will call the `ref` callback with the DOM element when the component mounts, and call it with `null` when it unmounts. `ref` callbacks are invoked before `componentDidMount` or `componentDidUpdate` lifecycle hooks.
 
 Using the `ref` callback just to set a property on the class is a common pattern for accessing DOM elements. The preferred way is to set the property in the `ref` callback like in the above example. There is even a shorter way to write it: `ref={input => this.textInput = input}`.