DataView.prototype.getFloat16()
Baseline 2025Newly available
Since April 2025, this feature works across the latest devices and browser versions. This feature might not work in older devices or browsers.
The getFloat16() method of DataView instances reads 2 bytes starting at the specified byte offset of this DataView and interprets them as a 16-bit floating point number. There is no alignment constraint; multi-byte values may be fetched from 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.setFloat16(1, Math.PI);
console.log(view.getFloat16(1));
// Expected output: 3.140625
Syntax
js
getFloat16(byteOffset)
getFloat16(byteOffset, littleEndian)
Parameters
byteOffset-
The offset, in bytes, from the start of the view to read the data from.
littleEndianOptional-
Indicates whether the data is stored in little- or big-endian format. If
falseorundefined, a big-endian value is read.
Return value
A floating point number from -65504 to 65504.
Exceptions
RangeError-
Thrown if the
byteOffsetis set such that it would read beyond the end of the view.
Examples
Using getFloat16()
js
const { buffer } = new Uint8Array([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
const dataview = new DataView(buffer);
console.log(dataview.getFloat16(1)); // 0.00001537799835205078
Specifications
| Specification |
|---|
| Float16Array # sec-dataview.prototype.getfloat16 |