API Reference > imodeljs-common > Entities > Base64EncodedString > Base64EncodedString.prefix Base64EncodedString.prefix Variable The prefix prepended to the string identifying it as base-64-encoded. Type "encoding=base64;" Default Value typescript "encoding=base64;" Defined in core/common/src/Base64EncodedString.ts Line 20 Last Updated: 12 June, 2024