/**
 * 命令考虑和 execCommand() 保持一致，便于理解
 * https://developer.mozilla.org/en-US/docs/Web/API/Document/execCommand
 */
export declare const COMMANDS: {
    BOLD: string;
    ITALIC: string;
    CODE: string;
    UNDERLINE: string;
    STRIKE_THROUGH: string;
    FONT_NAME: string;
    FONT_SIZE: string;
    BACK_COLOR: string;
    FORE_COLOR: string;
    INSERT_HR: string;
    SET_HEADING: string;
    FORMAT_BLOCK: string;
    INSERT_IMAGE: string;
    WRAP_IN_BLOCKQUOTE: string;
    UNWRAP_BLOCKQUOTE: string;
    REDO: string;
    UNDO: string;
};