/**
 * 检查两个值是否相等
 *
 * @example
 * ```ts
 * isEqual(true, false)
 * // => false
 * isEqual(false, false)
 * // => true
 * isEqual('0', '1')
 * // => false
 * isEqual([], [])
 * // => true
 * isEqual([0, {}], [1, {}])
 * // => false
 * isEqual({}, {})
 * // => true
 * isEqual(new Date('2013-06-12'), new Date('2023-06-12'))
 * // => false
 * isEqual(new Date('2023-06-12'), new Date('2023-06-12'))
 * // => true
 * isEqual(/^\s+/, /^\s+/)
 * // => true
 * isEqual(/^\s+/, /^\S+/)
 * // => false
 * ```
 */
export declare function isEqual(value: any, other: any, seen?: WeakMap<object, any>): boolean;