Web Reference: ES2019 added the Array flatMap() method to JavaScript. The flatMap() method first maps all elements of an array and then creates a new array by flattening the array. Aug 5, 2025 · To help you perform common tasks efficiently, JavaScript provides a wide variety of array methods. These methods allow you to add, remove, find, and transform array elements with ease. Feb 24, 2026 · Note: If you're not yet familiar with array basics, consider first reading JavaScript First Steps: Arrays, which explains what arrays are, and includes other examples of common array operations.
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