react/prefer-es6-class Style
What it does
React offers you two ways to create traditional components: using the ES5 create-react-class module or the new ES6 class system.
Why is this bad?
This rule enforces a consistent React class style.
Example
jsx
var Hello = createReactClass({
render: function () {
return <div>Hello {this.props.name}</div>;
},
});