Add documentation for require-render-return

Author: yannickcr

README.md

@@ -91,6 +91,7 @@ The plugin has a [recommended configuration](#user-content-recommended-configura
 * [prop-types](docs/rules/prop-types.md): Prevent missing props validation in a React component definition
 * [react-in-jsx-scope](docs/rules/react-in-jsx-scope.md): Prevent missing `React` when using JSX
 * [require-extension](docs/rules/require-extension.md): Restrict file extensions that may be required
+* [require-render-return](docs/rules/require-render-return.md): Enforce ES5 or ES6 class for returning value in render function
 * [self-closing-comp](docs/rules/self-closing-comp.md): Prevent extra closing tags for components without children
 * [sort-comp](docs/rules/sort-comp.md): Enforce component methods order
 * [sort-prop-types](docs/rules/sort-prop-types.md): Enforce propTypes declarations alphabetical sorting

docs/rules/require-render-return.md

@@ -0,0 +1,37 @@
+# Enforce ES5 or ES6 class for returning value in render function (require-render-return)
+
+When writing the `render` method in a component it could be easy to forgot to return the JSX content. This rule will warn you if the `return` statement is missing.
+
+## Rule Details
+
+The following patterns are considered warnings:
+
+```js
+var Hello = React.createClass({
+  render() {
+    <div>Hello</div>;
+  }
+});
+
+class Hello extends React.Component {
+  render() {
+    <div>Hello</div>;
+  }
+}
+```
+
+The following patterns are not considered warnings:
+
+```js
+var Hello = React.createClass({
+  render() {
+    return <div>Hello</div>;
+  }
+});
+
+class Hello extends React.Component {
+  render() {
+    return <div>Hello</div>;
+  }
+}
+```