Float32Array

BaselineWidely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

TheFloat32Array typed array represents an array of 32-bit floating point numbers in the platform byte order. If control over byte order is needed, useDataView instead. The contents are initialized to0 unless initialization data is explicitly provided. Once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).

Float32Array is a subclass of the hiddenTypedArray class.

Constructor

Float32Array(): Creates a newFloat32Array object.

Static properties

Also inherits static properties from its parentTypedArray.

Float32Array.BYTES_PER_ELEMENT: Returns a number value of the element size.4 in the case ofFloat32Array.

Static methods

Inherits static methods from its parentTypedArray.

Instance properties

Also inherits instance properties from its parentTypedArray.

These properties are defined onFloat32Array.prototype and shared by allFloat32Array instances.

Float32Array.prototype.BYTES_PER_ELEMENT: Returns a number value of the element size.4 in the case of aFloat32Array.
Float32Array.prototype.constructor: The constructor function that created the instance object. ForFloat32Array instances, the initial value is theFloat32Array constructor.

// From a lengthconst float32 = new Float32Array(2);float32[0] = 42;console.log(float32[0]); // 42console.log(float32.length); // 2console.log(float32.BYTES_PER_ELEMENT); // 4// From an arrayconst x = new Float32Array([21, 31]);console.log(x[1]); // 31// From another TypedArrayconst y = new Float32Array(x);console.log(y[0]); // 21// From an ArrayBufferconst buffer = new ArrayBuffer(32);const z = new Float32Array(buffer, 4, 4);console.log(z.byteOffset); // 4// From an iterableconst iterable = (function* () {  yield* [1, 2, 3];})();const float32FromIterable = new Float32Array(iterable);console.log(float32FromIterable);// Float32Array [1, 2, 3]