The Array copyWithin() method copies array elements to another position in an array, overwriting the existing values.

The copyWithin() methods DOES NOT add items to the array.

<!-- html element to place output -->
<p id="my_cars"></p>

// array
let cars = ['Lamborghini', 'Ferrari', 'Maserati', 'Alfa Romeo', 'Astin Martin', 'Porsche'];

// copyWithin and place in html
document.getElementById('my_cars').innerHTML = cars.copyWithin(2,0,3);

The way this works (see Syntax section below):

• Target – place and overwrite starting at position 2 (Maserati) overwriting 3 items (Maserati, Alfa Romeo, Astin Martin)
• Start – copy start with item 0 (Lamborghini)
• End – copy 3 items starting with item 0 (Lamborghini, Ferrari, Maserati)

Lamborghini,Ferrari,Lamborghini,Ferrari,Maserati,Porsche

array.copyWithin(target, start, end)

Parameter	Description
target	The position to copy the elements to (required)
start	The start position (default is 0)
end	The end position (default is the array length)

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