javascript instance method

DataView.prototype.setInt32()

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.

Interactive exampleOpen the canonical MDN source to run this embedded demo.

// 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.
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 setInt32()

const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setInt32(0, 3);
dataview.getInt32(1); // 768

Specifications

SpecificationsStandards references are available on the canonical MDN page.

Browser compatibility

Browser compatibilityCompatibility data is available on the canonical MDN page.