similiquedicta/packages/drag-n-drop-upload/src/modifiers/removeBlock.ts

A Plugin Architecture on top of Draft.JS

import { Modifier, EditorState, SelectionState } from 'draft-js';

export default function removeBlock(
  editorState: EditorState,
  blockKey: string,
): EditorState {

  const content = editorState.getCurrentContent();
  const block = content.getBlockForKey(blockKey);

  const targetRange = new SelectionState({
    anchorKey: blockKey,
    anchorOffset: 0,
    focusKey: blockKey,
    focusOffset: block.getLength(),
  });

  const withoutBlock = Modifier.removeRange(content, targetRange, "backward");
  const resetBlock = Modifier.setBlockType(
    withoutBlock,
    withoutBlock.getSelectionAfter(),
    "unstyled"
  );

  const newState = EditorState.push(editorState, resetBlock, "remove-range");
  const newStateWithoutBlock = EditorState.forceSelection(
    newState,
    resetBlock.getSelectionAfter()
  );

  return newStateWithoutBlock;
}