/**
 * Compiles a JS expression into a function that can be evaluated with context.
 */
export declare function compile<T = any>(expr: string): (context?: {}, local?: {}) => T | undefined;
/**
 * Converts an expression string into an executable JS function. It will replace
 * all `${x}` type expressions and evaluate them based on a context.
 */
export declare function compileString(expr: string, isAttribute?: boolean): (vars: any) => string;