Do ArrayBuffers have a maximum length?

Question

I little confused here. Do ArrayBuffer allocate a new memory region for it? If so, what would be the safe maximum Blob size to put on it?

Answer 1

Here's an updated answer, at least according to Mozilla in July 2019:

The length property of an Array or an ArrayBuffer is represented with an unsigned 32-bit integer, that can only store values which are in the range from 0 to (2^32)-1.

(from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Errors/Invalid_array_length)

More details as of 2020-01-09:

Firefox seems to limit the size of the underlying buffer (so the limit is the number of bytes) whereas Chrome seems to limit the number of elements in a typed array. Also, Firefox's limit seems to be lower than what the mozilla link I posted says - according to the the link this

new ArrayBuffer(Math.pow(2, 32) - 1)

is a "valid case" but it throws a RangeError when run in the console (Firefox 72.0.1 64 bit on Windows 10)