Int8Array

20157

Int8Array 8 0 ( )

new Int8Array(length);
new Int8Array(typedArray);
new Int8Array(object);
new Int8Array(buffer [, byteOffset [, length]]);

TypedArray.

Int8Array.BYTES_PER_ELEMENT: Int8Array 1
Int8Array.length: 3 Int8Array.prototype.length
Int8Array.prototype: TypedArray

Int8Array.from(): int8Array Array.from()
Int8Array.of(): Int8Array Array.of()

TypedArray

Int8Array.prototype.constructor: Int8Array
Int8Array.prototype.buffer: Returns the ArrayBuffer referenced by the Int8Array Fixed at construction time and thus read only.
Int8Array.prototype.byteLength: Returns the length (in bytes) of the Int8Array from the start of its ArrayBuffer. Fixed at construction time and thus read only.
Int8Array.prototype.byteOffset: Returns the offset (in bytes) of the Int8Array from the start of its ArrayBuffer. 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.

TypedArray

// 
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

// 
var arr = new Int8Array([21, 31]);
console.log(arr[1]); // 31

// 
var x = new Int8Array([21, 31]);
var y = new Int8Array(x);
console.log(y[0]); // 21

//  ArrayBuffer 
var buffer = new ArrayBuffer(8);
var z = new Int8Array(buffer, 1, 4);


ECMAScript 2027 LanguageSpecification # sec-typedarray-objects

ECMAScript 2015 (ES6) Int8Array new new Int8Array TypeError

var dv = Int8Array([1, 2, 3]);
// TypeError: calling a builtin Int8Array constructor
// without new is forbidden

var dv = new Int8Array([1, 2, 3]);

MDN

2026526 MDN

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