What is the result of the following code snippet? const arr = [1, 2, 3]; const newArr = [...arr, 4]; console.log(newArr.length);

Explanation

The spread operator (...) expands the elements of the existing 'arr' array into a new array literal. By adding the number 4 after the spread elements, the resulting array becomes [1, 2, 3, 4]. The length of this new array is 4.

Key points

Spread operator creates a shallow copy
Array literals can combine spread elements with new values
Length property counts total elements in an array

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What is the result of the following code snippet? const arr = [1, 2, 3]; const newArr = […arr, 4]; console.log(newArr.length);