What is the time complexity of new Array(n).fill('apple') in JavaScript?

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I was searching for the answer to this question but was not able to find any.

What is the time complexity of new Array(n).fill('apple')?

For n=5, this will create an array with 5 'apple' strings: ['apple', 'apple', 'apple', 'apple', 'apple']

My assumption is new Array(5) will first create an array with 5 empty slots and then iterate through it to put 'apple' in each slot. In this case, the time complexity is O(N), N is the length of the array?

However, I also hear that some say that since it's a built-in method, it will only take O(1).



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