TypedArray.prototype.slice()

The slice() method returns a shallow copy of a portion of a typed array into a new typed array object. This method has the same algorithm as Array.prototype.slice(). TypedArray is one of the typed array types here.

Syntax

<var>typedarr</var>ay.slice([<var>begin</var>[, <var>end</var>]])

Parameters

begin Optional

Zero-based index at which to begin extraction.

As a negative index, begin indicates an offset from the end of the sequence. slice(-2) extracts the last two elements in the sequence.

If begin is omitted, slice begins from index 0.

end Optional

Zero-based index at which to end extraction. slice extracts up to but not including end.

slice(1,4) extracts the second element up to the fourth element (elements indexed 1, 2, and 3).

As a negative index, end indicates an offset from the end of the sequence. slice(2,-1) extracts the third element through the second-to-last element in the sequence.

If end is omitted, slice extracts to the end of the sequence (arr.length).

Return value

A new typed array containing the extracted elements.

Description

The slice method does not alter. It returns a shallow copy of elements from the original typed array.

If a new element is added to either typed array, the other typed array is not affected.

Examples

Return a portion of an existing typed array

var uint8 = new Uint8Array([1,2,3]);
uint8.slice(1);   // Uint8Array [ 2, 3 ]
uint8.slice(2);   // Uint8Array [ 3 ]
uint8.slice(-2);  // Uint8Array [ 2, 3 ]
uint8.slice(0,1); // Uint8Array [ 1 ]

Specifications

Browser compatibility

See also

• Array.prototype.slice()