draft.14

constructor() {
  ...
  this.getEditorState = () => this.state.editorState;
  this.blockRendererFn = customBlockRenderer(
    this.onChange,
    this.getEditorState
  );
}

...

const customBlockRenderer = (setEditorState, getEditorState) => (contentBlock) => {
  const type = contentBlock.getType(); // <-- [1]

  switch (type) {
    case 'SLIDER':
      return {
        component: EditorSlider, // <-- [2]
        props: {
          getEditorState, // <-- [3]
          setEditorState, // <-- [3]
        }
    };

    default: return null;
  }
};

const RenderMap = new Map({ // <-- [4]
  SLIDER: {
    element: 'div', // <-- [5]
  }
}).merge(DefaultDraftBlockRenderMap);