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.
Float16Arrayobjects. The contents are initialized to0unless 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)
Note: Float16Array() can only be constructed with TypeError.
Parameters
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 |