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. Feb 24, 2026 Β· The Array object, as with arrays in other programming languages, enables storing a collection of multiple items under a single variable name, and has members for performing common array operations. Sep 4, 2025 Β· Learn modern JavaScript array methods that replace messy loops. Save hours of coding with map, filter, reduce and 5 others. Tested code included.
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