Do not access Object.prototype method 'hasOwnProperty' from target object. It is a 'no-prototype-builtins' error.

solution.js

// if you have a javascript object and want to check if it has a key (property)
const obj = {
  "a": 1,
  "b": 2,
  "c": 3,
}

// checking directly from the object might piss off ESLint
obj.hasOwnProperty("c"); // 'no-prototype-builtins' error.

// to make the error go away, do it like this
Object.prototype.hasOwnProperty.call(obj, "c"); // true

// ESLint is trying to prevent you from possible shadowing of the hasOwnProperty method
// further explanation: https://stackoverflow.com/a/39283005

As this solution is high in the google results I suggest a little correction here. The solution is almost correct but gives an error. The correct way is:

Object.prototype.hasOwnProperty.call(obj, "c");

You are correct, I will update it. Thanks!