Baseline Widely available
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.
// 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
setInt32(byteOffset, value)
setInt32(byteOffset, value, littleEndian)
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.
RangeError
Thrown if the byteOffset is set such that it would store beyond the end of the view.
const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setInt32(0, 3);
dataview.getInt32(1); // 768
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