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Showing content from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/slice below:

TypedArray.prototype.slice() - JavaScript | MDN

Baseline Widely available

The slice() method of TypedArray instances returns a copy of a portion of a typed array into a new typed array object selected from start to end (end not included) where start and end represent the index of items in that typed array. The original typed array will not be modified. This method has the same algorithm as Array.prototype.slice().

const uint8 = new Uint8Array([10, 20, 30, 40, 50]);
const array1 = uint8.slice(1, 3);

console.log(array1);
// Expected output: Uint8Array [20, 30]

slice()
slice(start)
slice(start, end)

start Optional

Zero-based index at which to start extraction, converted to an integer.

end Optional

Zero-based index at which to end extraction, converted to an integer. slice() extracts up to but not including end.

A new typed array containing the extracted elements.

See Array.prototype.slice() for more details. This method is not generic and can only be called on typed array instances.

const 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 ]

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