ThesetInt32() method ofDataView instances takes a number and stores it as a 32-bit signed integer in the 4 bytes starting at the specified byte offset of thisDataView. 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 bytesconst buffer = new ArrayBuffer(16);const view = new DataView(buffer);view.setInt32(1, 2147483647); // Max signed 32-bit integerconsole.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, seeValue encoding and normalization.

littleEndianOptional

Indicates whether the data is stored inlittle- or big-endian format. Iffalse orundefined, a big-endian value is written.

Return value

undefined.

Exceptions

RangeError

Thrown if thebyteOffset 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

Browser compatibility

See also

• JavaScript typed arrays guide
• DataView
• ArrayBuffer
• Int32Array