The Int8Array
typed array represents an array of twos-complement 8-bit signed integers. The contents are initialized to 0
. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
Constructor
Int8Array()
- Creates a new
Int8Array
object.
Static properties
Int8Array.BYTES_PER_ELEMENT
- Returns a number value of the element size.
1
in the case of anInt8Array
. Int8Array.name
- Returns the string value of the constructor name. In the case of the
Int8Array
type: "Int8Array".
Static methods
Int8Array.from()
- Creates a new
Int8Array
from an array-like or iterable object. See alsoArray.from()
. Int8Array.of()
- Creates a new
Int8Array
with a variable number of arguments. See alsoArray.of()
.
Instance properties
Int8Array.prototype.buffer
- Returns the
ArrayBuffer
referenced by theInt8Array
Fixed at construction time and thus read only. Int8Array.prototype.byteLength
- Returns the length (in bytes) of the
Int8Array
from the start of itsArrayBuffer
. Fixed at construction time and thus read only. Int8Array.prototype.byteOffset
- Returns the offset (in bytes) of the
Int8Array
from the start of itsArrayBuffer
. Fixed at construction time and thus read only. Int8Array.prototype.length
- Returns the number of elements hold in the
Int8Array
. Fixed at construction time and thus read only.
Instance methods
Int8Array.prototype.copyWithin()
- Copies a sequence of array elements within the array. See also
Array.prototype.copyWithin()
. Int8Array.prototype.entries()
- Returns a new
Array Iterator
object that contains the key/value pairs for each index in the array. See alsoArray.prototype.entries()
. Int8Array.prototype.every()
- Tests whether all elements in the array pass the test provided by a function. See also
Array.prototype.every()
. Int8Array.prototype.fill()
- Fills all the elements of an array from a start index to an end index with a static value. See also
Array.prototype.fill()
. Int8Array.prototype.filter()
- Creates a new array with all of the elements of this array for which the provided filtering function returns true. See also
Array.prototype.filter()
. Int8Array.prototype.find()
- Returns the found value in the array, if an element in the array satisfies the provided testing function or
undefined
if not found. See alsoArray.prototype.find()
. Int8Array.prototype.findIndex()
- Returns the found index in the array, if an element in the array satisfies the provided testing function or -1 if not found. See also
Array.prototype.findIndex()
. Int8Array.prototype.forEach()
- Calls a function for each element in the array. See also
Array.prototype.forEach()
. Int8Array.prototype.includes()
- Determines whether a typed array includes a certain element, returning
true
orfalse
as appropriate. See alsoArray.prototype.includes()
. Int8Array.prototype.indexOf()
- Returns the first (least) index of an element within the array equal to the specified value, or -1 if none is found. See also
Array.prototype.indexOf()
. Int8Array.prototype.join()
- Joins all elements of an array into a string. See also
Array.prototype.join()
. Int8Array.prototype.keys()
- Returns a new
Array Iterator
that contains the keys for each index in the array. See alsoArray.prototype.keys()
. Int8Array.prototype.lastIndexOf()
- Returns the last (greatest) index of an element within the array equal to the specified value, or -1 if none is found. See also
Array.prototype.lastIndexOf()
. Int8Array.prototype.map()
- Creates a new array with the results of calling a provided function on every element in this array. See also
Array.prototype.map()
. Int8Array.prototype.reduce()
- Apply a function against an accumulator and each value of the array (from left-to-right) as to reduce it to a single value. See also
Array.prototype.reduce()
. Int8Array.prototype.reduceRight()
- Apply a function against an accumulator and each value of the array (from right-to-left) as to reduce it to a single value. See also
Array.prototype.reduceRight()
. Int8Array.prototype.reverse()
- Reverses the order of the elements of an array — the first becomes the last, and the last becomes the first. See also
Array.prototype.reverse()
. Int8Array.prototype.set()
- Stores multiple values in the typed array, reading input values from a specified array.
Int8Array.prototype.slice()
- Extracts a section of an array and returns a new array. See also
Array.prototype.slice()
. Int8Array.prototype.some()
- Returns true if at least one element in this array satisfies the provided testing function. See also
Array.prototype.some()
. Int8Array.prototype.sort()
- Sorts the elements of an array in place and returns the array. See also
Array.prototype.sort()
. Int8Array.prototype.subarray()
- Returns a new
Int8Array
from the given start and end element index. Int8Array.prototype.values()
- Returns a new
Array Iterator
object that contains the values for each index in the array. See alsoArray.prototype.values()
. Int8Array.prototype.toLocaleString()
- Returns a localized string representing the array and its elements. See also
Array.prototype.toLocaleString()
. Int8Array.prototype.toString()
- Returns a string representing the array and its elements. See also
Array.prototype.toString()
. Int8Array.prototype[@@iterator]()
- Returns a new
Array Iterator
object that contains the values for each index in the array.
Examples
Different ways to create an Int8Array
// From a length var int8 = new Int8Array(2); int8[0] = 42; console.log(int8[0]); // 42 console.log(int8.length); // 2 console.log(int8.BYTES_PER_ELEMENT); // 1 // From an array var arr = new Int8Array([21,31]); console.log(arr[1]); // 31 // From another TypedArray var x = new Int8Array([21, 31]); var y = new Int8Array(x); console.log(y[0]); // 21 // From an ArrayBuffer var buffer = new ArrayBuffer(8); var z = new Int8Array(buffer, 1, 4); // From an iterable var iterable = function*(){ yield* [1,2,3]; }(); var int8 = new Int8Array(iterable); // Int8Array[1, 2, 3]
Specifications
Specification |
---|
ECMAScript (ECMA-262) The definition of 'TypedArray constructors' in that specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Desktop | Mobile | Server | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Int8Array | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 4 | IE Full support 10 | Opera Full support 11.6 | Safari Full support 5.1 | WebView Android Full support 4 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 12 | Safari iOS Full support 4.2 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.10 |
Int8Array() constructor | Chrome Full support 7 | Edge Full support 12 | Firefox Full support 4 | IE Full support 10 | Opera Full support 11.6 | Safari Full support 5.1 | WebView Android Full support 4 | Chrome Android Full support 18 | Firefox Android Full support 4 | Opera Android Full support 12 | Safari iOS Full support 4.2 | Samsung Internet Android Full support 1.0 | nodejs Full support 0.10 |
Legend
- Full support
- Full support