Float16Array() constructor
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 Float16Array() constructor creates Float16Array objects. The contents are initialized to 0 unless initialization data is explicitly provided.
Syntax
js
new Float16Array()
new Float16Array(length)
new Float16Array(typedArray)
new Float16Array(object)
new Float16Array(buffer)
new Float16Array(buffer, byteOffset)
new Float16Array(buffer, byteOffset, length)
Parameters
See TypedArray.
Exceptions
See TypedArray.
Examples
Different ways to create a Float16Array
js
// From a length
const float16 = new Float16Array(2);
float16[0] = 42;
console.log(float16[0]); // 42
console.log(float16.length); // 2
console.log(float16.BYTES_PER_ELEMENT); // 2
// From an array
const x = new Float16Array([21, 31]);
console.log(x[1]); // 31
// From another TypedArray
const y = new Float16Array(x);
console.log(y[0]); // 21
// From an ArrayBuffer
const buffer = new ArrayBuffer(32);
const z = new Float16Array(buffer, 4, 4);
console.log(z.byteOffset); // 4
// From an iterable
const iterable = (function* () {
yield* [1, 2, 3];
})();
const float16FromIterable = new Float16Array(iterable);
console.log(float16FromIterable);
// Float16Array [1, 2, 3]
Specifications
| Specification |
|---|
| ECMAScript® 2026 Language Specification # sec-typedarray-constructors |