@polkadot/util/is/jsonObject.js

A collection of useful utilities for @polkadot

import { stringify } from '../stringify.js';
/**
 * @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
 * ```
 */
export function isJsonObject(value) {
    const str = typeof value !== 'string'
        ? stringify(value)
        : value;
    try {
        const obj = JSON.parse(str);
        return typeof obj === 'object' && obj !== null;
    }
    catch {
        return false;
    }
}