@polkadot/util/cjs/is/jsonObject.js

A collection of useful utilities for @polkadot

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.isJsonObject = isJsonObject;

var _stringify = require("../stringify");

// Copyright 2017-2022 @polkadot/util authors & contributors
// SPDX-License-Identifier: Apache-2.0

/**
 * @name isJsonObject
 * @summary Tests for a valid JSON `object`.
 * @description
 * Checks to see if the input value is a valid JSON object.
 * It returns false if the input is JSON parsable, but not an Javascript object.
 * @example
 * <BR>
 *
 * ```javascript
 * import { isJsonObject } from '@polkadot/util';
 *
 * isJsonObject({}); // => true
 * isJsonObject({
 *  "Test": "1234",
 *  "NestedTest": {
 *   "Test": "5678"
 *  }
 * }); // => true
 * isJsonObject(1234); // JSON parsable, but not an object =>  false
 * isJsonObject(null); // JSON parsable, but not an object => false
 * isJsonObject('not an object'); // => false
 * ```
 */
function isJsonObject(value) {
  const str = typeof value !== 'string' ? (0, _stringify.stringify)(value) : value;

  try {
    const obj = JSON.parse(str);
    return typeof obj === 'object' && obj !== null;
  } catch (e) {
    return false;
  }
}