TypedArray

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TypedArray ( ) (ArrayBuffer). TypedArray, TypedArray. , . . , .

new TypedArray(); //   ES2017
new TypedArray(length);
new TypedArray(typedArray);
new TypedArray(object);
new TypedArray(buffer [, byteOffset [, length]]);

 TypedArray()     :

Int8Array(), Uint8Array(), Uint8ClampedArray(), Int16Array(), Uint16Array(), Int32Array(), Uint32Array(), Float32Array(), Float64Array()

length: length BYTES_PER_ELEMENT ,
typedArray: typedArray, (, Int32Array), typedArray . typedArray . typedArray typedArray
object: , TypedArray.from()
buffer, byteOffset, length: buffer byteOffset length, , buffer ArrayBuffer. byteOffset length () , . (byteOffset length) , buffer; length, , byteOffset.

ECMAScript 2015 TypedArray, TypedArray-. : - %TypedArray% TypedArray . Object.getPrototypeOf(...) (, Int8Array.prototype). TypedArrays %TypedArray%. , (TypedArray.prototype) %TypedArray%.prototype.

%TypedArray% . new TypeError, , JS-, . , %TypedArray% () TypedArray.

TypedArray (, Int8Array), , ArrayBuffer , . , %TypedArray%.prototype, , , .

(, arr[12]). , , . ArrayBuffer . .

//      
var int16 = new Int16Array(2);
int16[0] = 42;
console.log(int16[0]); // 42

//     ( 20     "foo")
Int8Array.prototype[20] = "foo";
new Int8Array(32)[20]; // 0
//         
Int8Array.prototype[20] = "foo";
new Int8Array(8)[20]; // undefined
//     
Int8Array.prototype[-1] = "foo";
new Int8Array(8)[-1]; // undefined

//   
Int8Array.prototype.foo = "bar";
new Int8Array(32).foo; // "bar"

TypedArray

		()		Web IDL	C
`Int8Array`	-128 127	1	8-	`byte`	`int8_t`
`Uint8Array`	0 255	1	8-	`octet`	`uint8_t`
`Uint8ClampedArray`	0 255	1	8- ( 0 255)	`octet`	`uint8_t`
`Int16Array`	-32768 32767	2	16-	`short`	`int16_t`
`Uint16Array`	0 65535	2	16-	`unsigned short`	`uint16_t`
`Int32Array`	-2147483648 2147483647	4	32-	`long`	`int32_t`
`Uint32Array`	0 4294967295	4	32-	`unsigned long`	`uint32_t`
`Float32Array`	1.2x10-38 to 3.4x1038	4	32- IEEE- (7 , 1.123456)	`unrestricted float`	`float`
`Float64Array`	5.0x10-324 to 1.8x10308	8	64- IEEE- (16 , , 1.123...15)	`unrestricted double`	`double`

TypedArray.BYTES_PER_ELEMENT: .
TypedArray.length: "", 0.
TypedArray.name: . , "Int8Array".
get TypedArray[@@species]: . .
TypedArray: TypedArray-.

TypedArray.from(): . Array.from().
TypedArray.of(): , . Array.of().

TypedArray

TypedArrays- TypedArray.

()

, TypedArray, , , Arrays. Javascript- , Typed Array.

var typedArrayTypes = [
  Int8Array,
  Uint8Array,
  Uint8ClampedArray,
  Int16Array,
  Uint16Array,
  Int32Array,
  Uint32Array,
  Float32Array,
  Float64Array,
];

for (var k in typedArrayTypes)
  for (var v in Array.prototype)
    if (
      Array.prototype.hasOwnProperty(v) &&
      !typedArrayTypes[k].prototype.hasOwnProperty(v)
    )
      typedArrayTypes[k].prototype[v] = Array.prototype[v];

Specification
ECMAScript 2027 LanguageSpecification # sec-typedarray-objects

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This page was last modified on 29 . 2026 . by MDN contributors.

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TypedArray

TypedArray

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