JavaScript Array Map () method

Grammar:

Array.map (function(Currentvalue,index,arr), Thisvalue)

CurrentValue: Must. The value of the current element
Index: Optional. Index value of the current element
Arr: Optional. The array object to which the current element belongs
Thisvalue: Optional. The object is used as the execution callback, passed to the function, and used as the value of "this". Can change this point,

The map () method returns a new array in which the elements of the array call the function-processed values for the original array element.

The map () method processes the elements sequentially, in the order of the original array elements.

Note: map () does not detect empty arrays.

Note: map () does not change the original array.

JavaScript Array Map () method