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13 May 20263 min readUpdated 13 May 2026

Understanding Typed Array Methods in JavaScript

Typed Array Methods The Method The method is used to create a new typed array from any iterable object. The Method The method allows for the creation of a new typed array from a...

Understanding Typed Array Methods in JavaScript

Typed Array Methods

The from() Method

The from() method is used to create a new typed array from any iterable object.

The of() Method

The of() method allows for the creation of a new typed array from a set of arguments.

The constructor.name Property

The constructor.name property retrieves the name, or type, of a typed array.

The BYTES_PER_ELEMENT Property

BYTES_PER_ELEMENT returns the number of bytes required to store each element in a typed array.

Common Array Methods

Typed Arrays in JavaScript share many methods with Standard Arrays:

  • Iteration: Methods like forEach(), map(), filter(), reduce(), reduceRight(), every(), some(), find(), findIndex(), findLast(), and findLastIndex().
  • Searching: Includes includes(), indexOf(), lastIndexOf().
  • Manipulation: Methods such as at(), copyWithin(), fill(), reverse(), set(), slice(), sort(), and subarray().
  • Conversion: Includes join(), toLocaleString(), toString().
  • Non-mutating methods: Includes toReversed(), toSorted(), and with().

Illustration for: - Iteration: Methods like `for...

The fill() Method

The fill() method is used to change all elements in a typed array to a specified value. It can accept two optional arguments to specify a start index and an end index.

The find() Method

The find() method returns the first element within the typed array that satisfies a provided testing function.

The some() Method

The some() method checks if at least one element in the typed array passes a specified test function, returning true if so.

Not Available Array Methods

Certain array methods are not supported by typed arrays due to their fixed-length nature. These methods include:

  • pop()
  • push()
  • shift()
  • unshift()
  • splice()
  • flat()
  • flatMap()
  • concat()
  • toSpliced()

Browser Support

Typed Arrays are an ES6 feature, fully supported in all modern browsers since mid-2017:

  • Chrome: Version 51
  • Edge: Version 15
  • Firefox: Version 54
  • Safari: Version 10
  • Opera: Version 38

Learn More

To explore more about typed arrays, you can look into topics such as:

  • Typed Array Tutorial
  • Typed Array Reference
  • Array Buffers
  • DataViews
  • Atomics