Array slice()

slice() returns the sub-array. The slice() method may accept one or two arguments:

the starting
stopping positions.

slice(startingPoint) returns sub-array between startingPoint and the end of the array. slice(startingPoint,endPosition) returns sub-array between the startingPosition and endPosition, not including the item in the end position.

slice() does not affect the original array in any way.

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
        var colors = ["A", "B", "C", "D", "E"]; 
        var colors2 = colors.slice(1); 
        var colors3 = colors.slice(1,4); 
        document.writeln(colors2); //B,C,D,E
        document.writeln(colors3); //B,C,D
       
    </script>
</head>
<body>
</body>
</html>

Click to view the demo

If either the start or end position of slice() is a negative number, then the number is subtracted from the length of the array.

arrayWithFiveItem.slice(-2, -1) is the same as arrayWithFiveItem.slice(3, 4).

 
<!DOCTYPE html>
<html>
<head>
    <title>Example</title>
    <script type="text/javascript">
        var colors = ["A", "B", "C", "D", "E"]; 
        var colors2 = colors.slice(-2,-1); 
        var colors3 = colors.slice(3,4); 
        document.writeln(colors2); //D
        document.writeln(colors3); //D
       
    </script>
</head>
<body>
</body>
</html>

Click to view the demo

If the end position is smaller than the start, then an empty array is returned.