`isReactComponent()` returns false for components without `render()`

I have few components which render() method encapsulated into mixin. Like so:

var Mixin = {
  render() {
    return (
      <h1>{ this.prop.header }</h1><div>{ this._renderBody() }</div>
    );
  }
};

var Comp1 = React.createClass({
  mixins: [ Mixin ],
  _renderBody() {
    return 'comp 1';
  }
});

var Comp2 = React.createClass({
  mixins: [ Mixin ],
  _renderBody() {
    return 'comp 2';
  }
});

And because of that some rules are ignored (e.g. sort-comp rule).
So I propose to check when there is no render() method inside component if the mixins prop is declared or not.

[lencioni]

It might be useful to check out react-codemod’s ReactUtils to see the methods they use for this kind of thing.

[ljharb]

I’m going to close this; in general, component detection needs some work, but there’s been many updates since this was filed.

New issues with concrete and actionable improvements are welcome!