JSON.stringify

Implement a custom version of JSON.stringify. This function should serialize a JavaScript object or value into a JSON string. The implementation should mimic the behavior of the native JSON.stringify, including handling of:

• Primitives (string, number, boolean, null)
• Arrays and nested arrays
• Plain objects with nested properties
• Functions and undefined (ignored in objects, replaced with null in arrays)

Example Inputs & Outputs

JSONStringify("hello") 
// → '"hello"'

JSONStringify({ name: "Alice", age: 30 }) 
// → '{"name":"Alice","age":30}'

JSONStringify([1, "a", true, null]) 
// → '[1,"a",true,null]'

JSONStringify({ a: undefined, b: function() {}, c: 5 }) 
// → '{"c":5}'

JSONStringify([undefined, function() {}, 5]) 
// → '[null,null,5]'

Constraints & Edge Cases

• Should handle all basic types: string, number, boolean, null, object, array
• Functions and undefined:
  • Omitted in objects
  • Converted to null in arrays
• Throws TypeError on circular references
• Does not handle special objects like Date, Set, Map, etc.