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DataView.prototype.setUint16() - JavaScript | MDN
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  1. Web
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  4. Standard built-in objects
  5. DataView
  6. setUint16()
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DataView.prototype.setUint16()

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 setUint16() method of DataView instances takes a number and stores it as a 16-bit unsigned integer in the 2 bytes starting at the specified byte offset of this DataView. There is no alignment constraint; multi-byte values may be stored at any offset within bounds.

In this article

Try it

// Create an ArrayBuffer with a size in bytes const buffer = new ArrayBuffer(16); const view = new DataView(buffer); view.setUint16(1, 65535); // Max unsigned 16-bit integer console.log(view.getUint16(1)); // Expected output: 65535

Syntax

js
setUint16(byteOffset, value) setUint16(byteOffset, value, littleEndian)

Parameters

byteOffset

The offset, in bytes, from the start of the view to store the data in.

value

The value to set. For how the value is encoded in bytes, see Value encoding and normalization.

littleEndian Optional

Indicates whether the data is stored in little- or big-endian format. If false or undefined, a big-endian value is written.

Return value

undefined.

Exceptions

RangeError

Thrown if the byteOffset is set such that it would store beyond the end of the view.

Examples

Using setUint16()

js
const buffer = new ArrayBuffer(10); const dataview = new DataView(buffer); dataview.setUint16(0, 3); dataview.getUint16(1); // 768

Specifications

Specification
ECMAScript® 2027 Language Specification
# sec-dataview.prototype.setuint16

Browser compatibility

Enable JavaScript to view this browser compatibility table.

See also

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This page was last modified on Jul 10, 2025 by MDN contributors.

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  1. Standard built-in objects
  2. DataView
  3. Constructor
    1. DataView()
  4. Instance methods
    1. getBigInt64()
    2. getBigUint64()
    3. getFloat16()
    4. getFloat32()
    5. getFloat64()
    6. getInt8()
    7. getInt16()
    8. getInt32()
    9. getUint8()
    10. getUint16()
    11. getUint32()
    12. setBigInt64()
    13. setBigUint64()
    14. setFloat16()
    15. setFloat32()
    16. setFloat64()
    17. setInt8()
    18. setInt16()
    19. setInt32()
    20. setUint8()
    21. setUint16()
    22. setUint32()
  5. Instance properties
    1. buffer
    2. byteLength
    3. byteOffset
  6. Inheritance
  7. Object/Function
  8. Static methods
    1. apply()
    2. bind()
    3. call()
    4. toString()
    5. [Symbol.hasInstance]()
  9. Static properties
    1. displayName
    2. length
    3. name
    4. prototype
    5. arguments
    6. caller
  10. Instance methods
    1. __defineGetter__()
    2. __defineSetter__()
    3. __lookupGetter__()
    4. __lookupSetter__()
    5. hasOwnProperty()
    6. isPrototypeOf()
    7. propertyIsEnumerable()
    8. toLocaleString()
    9. toString()
    10. valueOf()
  11. Instance properties
    1. __proto__
    2. constructor

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