Move constructor out of render

content/docs/accessibility.md

@@ -147,13 +147,13 @@ To set focus in React, we can use [Refs to DOM elements](/docs/refs-and-the-dom.
 Using this, we first create a ref to an element in the JSX of a component class:
 
 ```javascript{4-5,8-9,13}
-render() {
+class CustomTextInput extends React.Component {
   constructor(props) {
     super(props);
     // Create a ref to store the textInput DOM element
     this.textInput = React.createRef();
   }
-  // ...
+  render() {
   // Use the `ref` callback to store a reference to the text input DOM
   // element in an instance field (for example, this.textInput).
     return (
@@ -163,6 +163,7 @@ render() {
       />
     );
   }
+}
 ```
 
 Then we can focus it elsewhere in our component when needed: