/** JavaScript implementation of a Stack */
declare class Stack<E> {
    #private;
    /**
     * Creates a new stack.
     */
    constructor();
    /**
     * Pushes a value onto the stack.
     * @param value - The value to be pushed.
     */
    push(value: E): void;
    /**
     * Pops the top value off the stack and returns it.
     * Returns undefined if the stack is empty.
     * @returns The popped value or undefined.
     */
    pop(): E | undefined;
    /**
     * Peeks at the top value on the stack without popping it.
     * Returns undefined if the stack is empty.
     * @returns The top value of the stack or undefined.
     */
    peek(): E | undefined;
    /**
     * Checks if the stack is empty.
     * @returns True if the stack is empty, false otherwise.
     */
    isEmpty(): boolean;
    /**
     * Returns the number of items in the stack.
     * @returns The number of items in the stack.
     */
    get size(): number;
}

export { Stack };