TypedArray.BYTES_PER_ELEMENT

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The TypedArray.BYTES_PER_ELEMENT static data property represents the size in bytes of each element in a typed array.

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Value

A number whose value depends on the type of TypedArray.

Property attributes of TypedArray.BYTES_PER_ELEMENT
Writable no
Enumerable no
Configurable no

Description

TypedArray objects differ from each other in the number of bytes per element and in the way the bytes are interpreted. The BYTES_PER_ELEMENT constant contains the number of bytes each element in the given TypedArray has.

The BYTES_PER_ELEMENT property is both an instance property and a static property. It's available on both TypedArray subclass constructors and on instances of those constructors.

As an instance property, BYTES_PER_ELEMENT is defined on the constructor's prototype.

js
console.log(Object.hasOwn(Int8Array.prototype, "BYTES_PER_ELEMENT")); // true

Examples

Using BYTES_PER_ELEMENT

As a static property:

js
Int8Array.BYTES_PER_ELEMENT; // 1
Uint8Array.BYTES_PER_ELEMENT; // 1
Uint8ClampedArray.BYTES_PER_ELEMENT; // 1
Int16Array.BYTES_PER_ELEMENT; // 2
Uint16Array.BYTES_PER_ELEMENT; // 2
Float16Array.BYTES_PER_ELEMENT; // 2
Int32Array.BYTES_PER_ELEMENT; // 4
Uint32Array.BYTES_PER_ELEMENT; // 4
Float32Array.BYTES_PER_ELEMENT; // 4
Float64Array.BYTES_PER_ELEMENT; // 8
BigInt64Array.BYTES_PER_ELEMENT; // 8
BigUint64Array.BYTES_PER_ELEMENT; // 8

As an instance property:

js
new Int8Array([]).BYTES_PER_ELEMENT; // 1
new Uint8Array([]).BYTES_PER_ELEMENT; // 1
new Uint8ClampedArray([]).BYTES_PER_ELEMENT; // 1
new Int16Array([]).BYTES_PER_ELEMENT; // 2
new Uint16Array([]).BYTES_PER_ELEMENT; // 2
new Float16Array([]).BYTES_PER_ELEMENT; // 2
new Int32Array([]).BYTES_PER_ELEMENT; // 4
new Uint32Array([]).BYTES_PER_ELEMENT; // 4
new Float32Array([]).BYTES_PER_ELEMENT; // 4
new Float64Array([]).BYTES_PER_ELEMENT; // 8
new BigInt64Array([]).BYTES_PER_ELEMENT; // 8
new BigUint64Array([]).BYTES_PER_ELEMENT; // 8

Specifications

Specification
ECMAScript Language Specification
# sec-typedarray.bytes_per_element

Browser compatibility

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See also