Create a new array with the sub-array elements concatenated:
const myArr = [[1,2],[3,4],[5,6]];
const newArr = myArr.flat();
const myArr = [1, 2, [3, [4, 5, 6], 7], 8];
const newArr = myArr.flat(2);
The flat() method concatenates sub-array elements.
JavaScript Array flat() is supported in all modern browsers since January 2020:
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