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From: Ben Bacarisse <ben.usenet@bsb.me.uk>
Newsgroups: comp.lang.javascript
Subject: Re: How do I convert the following to Uint8Array.
Date: Sat, 23 Jan 2016 11:17:16 +0000
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Robby Balona <robby@grab.co.za> writes:

> On Friday, January 22, 2016 at 1:52:47 PM UTC+2, Robby Balona wrote:
<snip>
>> I have a string "ab05d705" and I am trying to convert it to the
>> following so I can add it to a Uint8Array. So how do I convert the
>> string "ab05d705" to
>> 0xab,0x05,0xd7,0x05 to put into the following 
>> var data = new Uint8Array([0xab,0x05,0xd7,0x05]);
<snip>
> Thanks everyone for the wonderful help but I get this error when I try
> to use Uint8Array.from
>
> TypeError: Object function Uint8Array() { [native code] } has no method 'from'
>
> Perhaps I should have also stated that I am using Cordova to do this
> project .. My bad, should have given more details

Most of the solutions can be altered to avoid using Uint8Array.from.
For example, s.match(/../g).map(s => parseInt(s, 16)) simply makes an
array of numbers which could be used as in your own example:

  var data = new Uint8Array(s.match(/../g).map(s => parseInt(s, 16)));

I don't know Cordova, so you might also run into trouble with the "arrow
function" syntax.  In which case, you need the more wordy

  s.match(/../g).map(function (s) { return parseInt(s, 16); })

-- 
Ben.