Could someone test my alarm clock on Safari?

I decided to build a JavaScript alarm clock after seeing a rather cool looking one for sale online. I’ve tested it out in Chrome and Firefox, but I’m on a PC so I can’t get the latest version of Safari. I was wondering if someone could test it out for me to see if it works. https://codefu-clock.surge.sh/ You can program an alarm by clicking either one of the alarm buttons on the side, and entering a time. Thanks in advance!!

Hi I tried it with both alarms. When the time is reached, the “stop” button appears but there is no sound even if I set the sound level to maximum. When I checked the mp3 itself, it’s loud and clear. There must be some Safari-specific thing to add to make it work. Sorry.

tested on Safari 11.0 on OSX 10.11.6 (El Capitan)