Javascript Reference - JavaScript Array slice() Method
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.
Browser Support
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slice() |
Yes | Yes | Yes | Yes | Yes |
Syntax
array.slice(start,end)
Parameter Values
| Parameter | Description |
|---|---|
| start | Required. An integer to set where to start the selection. The first element starts at 0. Negative numbers selects from the end of an array. |
| end | Optional. An integer to set where to end the selection. If omitted, default to the end of the array. Negative numbers selects from the end of an array |
Return Value
A new Array containing the selected elements.
Example
var colors = ["A", "B", "C", "D", "E"];
var colors2 = colors.slice(1);
var colors3 = colors.slice(1,4);
console.log(colors2); //B,C,D,E
console.log(colors3); //B,C,D
The code above generates the following result.
slice negative value
If either the start or end position of slice() is a negative number, then the number is subtracted from the length of the array.
For the array in the following code,
arrayWithFiveItem.slice(-2, -1)
is the same as arrayWithFiveItem.slice(3, 4).
var colors = ["A", "B", "C", "D", "E"];
var colors2 = colors.slice(-2,-1);
var colors3 = colors.slice(3,4);
console.log(colors2); //D
console.log(colors3); //D
If the end position is smaller than the start, then an empty array is returned.
The code above generates the following result.
