@hmlr/govuk-react-components-library/dist/types/components/PDFViewer/ResolvePDFSource.d.ts

These are common component use for React applications based on GDS and govuk-frontend

import { SourceDeterminer } from "./PDFViewer.types";
/**
 * Convert a base64 string to an ArrayBuffer
 */
export declare const _base64ToArrayBuffer: (base64: string) => ArrayBuffer;
/**
 * Very small heuristic to detect a plain base64 string
 */
export declare const isBase64: (value: string) => boolean;
/**
 * ResolvePDFSource
 *
 * Accepts a source that may be:
 *  - a plain base64 string (PDF binary encoded as base64)
 *  - a data: URL containing base64 (data:application/pdf;base64,...)
 *  - an existing blob: URL (blob:...)
 *  - a Blob/File object
 *  - a regular URL string (http(s) or same-origin path)
 *
 * Returns a SourceDeterminer:
 *  - { isBase64Source: true, source: string } when an object URL was created
 *  - { isBase64Source: false, source: string } when source can be used directly
 *
 * If an object URL is created, callers should revoke it when no longer needed:
 *  `URL.revokeObjectURL(source)`
 */
export declare const ResolvePDFSource: (source?: string | Blob | null) => SourceDeterminer;