text: export const CONTENT_HTML = "content/html";
  export const CONTENT_URL = "content/url";
  
  export const SECURITY_CUSTOM = "security/custom";
  export const SECURITY_NONE = "security/none";
  export const SECURITY_SANDBOX_NONFRIENDLY = "security/sandbox/nonfriendly";
  export const SECURITY_SANDBOX_SAMEORIGIN = "security/sandbox/sameorigin";
  
  export const WRITE_MODE_BLOB_URL = "write/blobURL";
  export const WRITE_MODE_DOC_WRITE = "write/documentWrite";
  export const WRITE_MODE_SRCDOC = "write/srcdoc";
  