Implement a JSON Parser in JS

Try to implement a JSON Parser in JS at algodaily.com/...
---
In JavaScript by default, there is a method that can parse a given JSON string, and it can be invoked by calling `JSON.parse()`. The way this method works is constructing the JavaScript value or object described by the string.
Can you implement your own version of this method, called `parseJSON`, accepting one parameter (the JSON string), keeping in mind all the value types and restrictions in the JSON format?
```js
function parseJSON(input) {
// fill in this method
}
```
Your task is to create a function called `parseJSON` that takes a string as input and returns the corresponding JavaScript object. The function should be able to handle JSON-like strings, which can be:
Primitive types: `null`, `true`, `false`
Strings wrapped in quotes: `"string"`
Arrays: `[1, "a", null]`
Objects: `{"key": "value", "anotherKey": 42}`
Your parser should return the corresponding JavaScript types for these string inputs. For example, if the input string is `"null"`, your function should return `null`.

[@aashag3192]

you need to return the input at the end of the funtion to make sure the value is returned if it doesn't go through any of the if condition, say parseJSON(2) should return 2

[@mitchellirvin5889]

this solution has a few big bugs.
splitting on a "," delim doesn't work as a way to split key:value pairs in an object, because it's possible for strings and lists to contain commas. also, valid JSON can have any amount of whitespace between symbols. this solution assumes a uniform style.
e.g. parse("{ "key" : [1, 2, 3]}") is broken, even though it's valid JSON
otherwise, nice solution!