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JavaScript Typed Array Methods


Typed Array Types

Revised July 2025

Name Range Type
Int8Array -128 / 127 1 byte signed integer
Uint8Array 0 / 255 1 byte unsigned integer
Uint8ClampedArray 0 / 255 1 byte unsigned integer
Int16Array -32768 / 32767 2 bytes signed short
Uint16Array 0 / 65535 2 bytes unsigned short
Int32Array -231 / 231 - 1 4 bytes signed long
Uint32Array 0 / 232 - 1 4 bytes unsigned long
BigInt64Array -263 / 263 - 1 8 bytes signed big integer
BigUint64Array 0 / 264 - 1 8 bytes unsigned big integer
   
Float16Array -65504 / 65504 2 bytes floating point
Float32Array -3.4e38 / 3.4e38 4 bytes floating point
Float64Array -1.8e308 / 1.8e308 8 bytes floating point

Typed Array Methods

Revised July 2025

Method Description
at() Returns one indexed element from a typed array
copyWithin() Copies array elements to another position in the array
entries() Returns an iterator object with the key/value pairs from the array
every() Executes a function for each typed array element
fill() Fill all elements with a value
filter() Creates a new array filled with elements that pass a test
find() Returns the first element that satisfies a condition
findIndex() Returns the index of the first element that satisfies a condition
findLast() Returns the last element that satisfies a condition
findLastIndex() Returns the index of the last element that satisfies a condition
from() Returns a typed array from any object with a length property
includes() Returns true if an array includes a specified value
indexOf() Returns the first index (position) of a specified value
lastIndexOf() Returns the last index (position) of a specified value
of() Create a typed array from an array
some() Reurns true if one element satisfies a condition

Browser Support

Typed Arrays is an ES6 feature (JavaScript 2015).

ES6 is fully supported in all modern browsers since June 2017:

Chrome 51 Edge 15 Firefox 54 Safari 10 Opera 38
May 2016 Apr 2017 Jun 2017 Sep 2016 Jun 2016

Typed Arrays is not supported in Internet Explorer.


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