DataView.prototype.getFloat16()

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used 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.

littleEndian Optional

Indicates whether the data is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

Return value

A floating point number from -65504 to 65504.

Exceptions

RangeError

Thrown if the byteOffset is 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

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobileserver
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Deno
Node.js
getFloat16

Legend

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Full support
Full support
No support
No support

See also