Find duplicate values in object javascript

1. How to find duplicate values in object JavaScript?
2. How to find duplicate keys in an object JavaScript?
3. How to check same value in object JavaScript?

How to find duplicate values in object JavaScript?

Using the filter() and indexOf() Methods

This is the shortest and the easiest way of finding duplicates in an array, where the filter() method traverses the array and filters items according to the defined condition and returns a new array, while the indexOf() gives the index of the passed item.

How to find duplicate keys in an object JavaScript?

No, JavaScript objects cannot have duplicate keys. The keys must all be unique.

How to check same value in object JavaScript?

To check if all of the values in an object are equal, use the Object. values() method to get an array of the object's values and call the every method on the array. On each iteration, check if the current value is equal to the value at index 0 of the array and return the result. Copied!