DataView.prototype.setInt32()
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 setInt32() method of DataView instances takes a number and stores it as a 32-bit signed integer in the 4 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.
Try it
// Create an ArrayBuffer with a size in bytes
const buffer = new ArrayBuffer(16);
const view = new DataView(buffer);
view.setInt32(1, 2147483647); // Max signed 32-bit integer
console.log(view.getInt32(1));
// Expected output: 2147483647
Syntax
setInt32(byteOffset, value)
setInt32(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.
littleEndianOptional-
Indicates whether the data is stored in little- or big-endian format. If
falseorundefined, a big-endian value is written.
Return value
Exceptions
RangeError-
Thrown if the
byteOffsetis set such that it would store beyond the end of the view.
Examples
Using setInt32()
const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setInt32(0, 3);
dataview.getInt32(1); // 768
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-dataview.prototype.setint32 |