The TypedArray.BYTES_PER_ELEMENT property represents the size in bytes of each element in an typed array.

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




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.


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
Int32Array.BYTES_PER_ELEMENT;        // 4
Uint32Array.BYTES_PER_ELEMENT;       // 4
Float32Array.BYTES_PER_ELEMENT;      // 4
Float64Array.BYTES_PER_ELEMENT;      // 8


Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 6.
ECMAScript 2015 (6th Edition, ECMA-262)
The definition of 'TypedArray.BYTES_PER_ELEMENT' in that specification.
Standard Initial definition in an ECMA standard.
ECMAScript 2017 Draft (ECMA-262)
The definition of 'TypedArray.BYTES_PER_ELEMENT' in that specification.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 7.0 4.0 (2) 10 11.6 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support 4.0 (Yes) 4.0 (2) 10 11.6 4.2

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,