Web Reference: Jul 10, 2025 · The flat() method is a copying method. It does not alter this but instead returns a shallow copy that contains the same elements as the ones from the original array. The flat() method removes empty slots if the array being flattened is sparse. Jul 15, 2025 · The code demonstrates flattening a nested array to different levels using the flat () method. It applies flat () with various depth parameters (0, 1, 2) to flatten nested arrays accordingly and logs the results. JavaScript Array flat() is supported in all modern browsers since January 2020: Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
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