export declare function base64Decode(str: string): string;
export declare const JSON_VALUE_MARKER = "__MDXISH_JSON__";
export declare const HTML_BLOCK_CONTENT_START = "<!--RDMX_HTMLBLOCK:";
export declare const HTML_BLOCK_CONTENT_END = ":RDMX_HTMLBLOCK-->";
/**
 * Pre-processes JSX-like expressions before markdown parsing.
 * Converts href={'value'} to href="value", evaluates {expressions}, etc.
 */
export type JSXContext = Record<string, unknown>;
/**
 * Evaluates a JavaScript expression using context variables.
 *
 * @param expression
 * @param context
 * @returns The evaluated result
 * @example
 * ```typescript
 * const context = { baseUrl: 'https://example.com', path: '/api' };
 * evaluateExpression('baseUrl + path', context)
 * // Returns: 'https://example.com/api'
 * ```
 */
export declare function evaluateExpression(expression: string, context: JSXContext): any;
/**
 * Removes JSX-style comments (e.g., { /* comment *\/ }) from content.
 *
 * @param content
 * @returns Content with JSX comments removed
 * @example
 * ```typescript
 * removeJSXComments('Text { /* comment *\/ } more text')
 * // Returns: 'Text  more text'
 * ```
 */
export declare function removeJSXComments(content: string): string;
/**
 * Preprocesses JSX-like expressions in markdown before parsing.
 * Inline expressions are handled separately; attribute expressions are processed here.
 *
 * @param content
 * @param context
 * @returns Preprocessed content ready for markdown parsing
 */
export declare function preprocessJSXExpressions(content: string, context?: JSXContext): string;