How to handle json duplicate keys from user input

Question

How to handle json duplicate keys from user input
I have an api where the user can give json array input, if the user entered a duplicate key i want to throw an error in TS,how to achieve it
A sample json array would be:
{
Name: false,
default:true,
Name:true
}
The above array has duplicate Name keys.I need to throw an error when the user enters duplicate keys

Answer 1

You can check does json object has key, check this article:
https://www.freecodecamp.org/news/how-to-check-if-an-object-has-a-key-in-javascript/amp/
This can be used to prevent user from adding duplicate key