I'm using Chrome Version 101.0.4951.64 (Official Build) (arm64) on a new m1 macbook pro. Is it expected behavior that
Array.isArray(new Float32Array([0, 1, 2]))
returns false?
console.log(Array.isArray(new Float32Array([1, 2, 3])));Typed arrays are not technically arrays, they are TypedArrays and have their own type:
let floatArr = new Float32Array();
console.log(Object.prototype.toString.call(floatArr));
console.log(Object.prototype.toString.call([]));And according to the MDN web docs:
JavaScript typed arrays are array-like objects
...
However, typed arrays are not to be confused with normal arrays, as callingArray.isArray()on a typed array returnsfalse.
TypedArrays aren't Arrays.
console.log(new Uint32Array instanceof Array)The equivalent of Array.isArray() for TypedArrays is ArrayBuffer.isView():
const typed = new Float32Array(1024);
const arr = new Array(1024);
console.log(Array.isArray(typed)); // false
console.log(Array.isArray(arr)); // true
console.log(ArrayBuffer.isView(typed)); // true
console.log(ArrayBuffer.isView(arr)); // falsewith the particularity that it will also return true for DataView objects.