JS ReferencesLesson #262
Typed Array Reference
[Typed Array Tutorial](jstypedarrays.asp)
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 |
| byteLength | Returns the length (in bytes) of a typed array. |
| byteOffset | Returns the offset (in bytes) of a typed array from the start of its ArrayBuffer |
| BYTES_PER_ ELEMENT | Returns the number of bytes used to store one element in 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 array elements with a value |
| filter() | Returns 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 |
| forEach() | Executes a function for each typed array element |
| 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 |
| join() | Returns the elements of an array as a string |
| keys() | Returns the keys of a typed array |
| lastIndexOf() | Returns the last index (position) of a specified value |
| length | Returns the lenth of the typed array |
| map() | Returns a new array from calling a function for every array element |
| name | Returns the name of the typed array |
| of() | Returns a new typed array from an existing array |
| reduce() | Reduce the values of an array to a single value |
| reduceRight() | Reduce the values of an array to a single value (right-to-left) |
| reverse() | Reverses a typed array in place |
| set() | Stores values in a typed array from another array |
| slice() | Reurns a new typed array sliced out of a typed array |
| some() | Reurns true if one element satisfies a condition |
| sort() | Sorts an array in place |
| subarray() | Returns a subarray in the same memory space |
| toLocaleString() | Returns all elements converted with their toLocaleString methods |
| toReversed() | Reverses an array into a new array. |
| toSorted() | Sorts an array into a new array. |
| toString() | Returns a string of all typed array elements |
| values() | Returns an iterator object with the values of an typed array |
| with() | Returns a new typed array with an updated array element |
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Browser Support
Typed Arrays is an ES6 feature.
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 |