The setFloat16() method of DataView instances takes a number and stores it as a 16-bit floating point number in the 2 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.

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

setFloat16(byteOffset, value)
setFloat16(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 setFloat16()

const buffer = new ArrayBuffer(10);
const dataview = new DataView(buffer);
dataview.setFloat16(0, 3);
dataview.getFloat16(1); // 0

Specifications

Browser compatibility

See also

• Polyfill of DataView.prototype.setFloat16 in core-js
• JavaScript typed arrays guide
• DataView
• ArrayBuffer
• Float16Array