The flat() method is used to flatten the array of arrays. The process of flattening depends on the depth of the array we want to flatten.
Syntax And Return Type
flat(depth) :— The depth level specifies how deep a nested array structure should be flattened. Default value is 1.Return Type — A new array with sub-array elements concatenated into itExamples
let arr1 = [1,2,[3,4,[5,6,]]];
arr1.flat(1) // [1,2,3,4,[5,6]];
arr1.flat(2) // [1,2,3,4,5,6];
arr1.flat(0) // [1,2,[3,4,[5,6]]];
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