WebFetchFormData.appendmethod FormData.append#FormData.append(name: string,value: string | Blob,fileName?: string,): voidParameters ##name: string#value: string | Bloboptional#fileName: stringReturn Type #void
method FormData.append#FormData.append(name: string,value: string | Blob,fileName?: string,): voidParameters ##name: string#value: string | Bloboptional#fileName: stringReturn Type #void