这是Draft.js中的一个JS版本的SFC:

const BlockStyleControls = (props) => {
  const {editorState} = props;
  const selection = editorState.getSelection();
  const blockType = editorState
    .getCurrentContent()
    .getBlockForKey(selection.getStartKey())
    .getType();
  return (
    <div className="RichEditor-controls">
      {BLOCK_TYPES.map((type) =>
        <StyleButton
          key={type.label}
          active={type.style === blockType}
          label={type.label}
          onToggle={props.onToggle}
          style={type.style}
        />
      )}
    </div>
  );
};

把它改成TypeScript！

interface BlockStyleControlsProps {
  editorState: EditorState;
  onToggle: (style: string) => void;
}
const BlockStyleControls: React.SFC<BlockStyleControlsProps> = (props) => {
  const {editorState} = props;
  const selection = editorState.getSelection();
  const blockType = editorState
    .getCurrentContent()
    .getBlockForKey(selection.getStartKey())
    .getType();
  return (
    <div className="trident-controls">
      {BLOCK_TYPES.map((type) =>
        <StyleButton
          key={type.label}
          active={type.style === blockType}
          label={type.label}
          onToggle={props.onToggle}
          style={type.style}
        />
      )}
    </div>
  );
};