SharedArrayBuffer.prototype.slice()
The slice()
method of SharedArrayBuffer
instances returns a
new SharedArrayBuffer
whose contents are a copy of this
SharedArrayBuffer
's bytes from begin, inclusive, up to end, exclusive. If
either begin or end is negative, it refers to an index from the end of the array, as
opposed to from the beginning. This method has the same algorithm as
Array.prototype.slice()
.
Try it
Syntax
js
slice()
slice(begin)
slice(begin, end)
Parameters
begin
Optional-
Zero-based index at which to begin extraction.
A negative index can be used, indicating an offset from the end of the sequence.
slice(-2)
extracts the last two elements in the sequence.If
begin
is undefined,slice
begins from index0
. end
Optional-
Zero-based index before which to end extraction.
slice
extracts up to but not includingend
.For example,
slice(1,4)
extracts the second element through the fourth element (elements indexed 1, 2, and 3).A negative index can be used, indicating 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 through the end of the sequence (sab.byteLength
).
Return value
A new SharedArrayBuffer
containing the extracted elements.
Examples
Using slice()
js
const sab = new SharedArrayBuffer(1024);
sab.slice(); // SharedArrayBuffer { byteLength: 1024 }
sab.slice(2); // SharedArrayBuffer { byteLength: 1022 }
sab.slice(-2); // SharedArrayBuffer { byteLength: 2 }
sab.slice(0, 1); // SharedArrayBuffer { byteLength: 1 }
Specifications
Specification |
---|
ECMAScript Language Specification # sec-sharedarraybuffer.prototype.slice |
Browser compatibility
BCD tables only load in the browser