Audio giving "The element has no supported sources" error on play

I'm making my first javascript game (Snake), and I've already finished most of it. Now I'm trying to add sound, but it's not working. I'm not using a server, I'm using a local html file.

This is the constructor method of the class where I'm trying to play a sound:

constructor(){
    ...
    this.collect_wav = new Audio("Sounds\\Coin.wav");
    ...
}

And later in one of the methods:

relocate(){
    ...
    this.collect_wav.play();
}

When the code runs, the new Audio runs without an error, but on the line play(), I get this error in the developer console: There is a "Sounds" folder in the same directory as my html file, and inside that folder is Coin.wav, so I think the path is correct, but it just doesn't work. But when I go into the developer console, and go to the sources tab, I don't even see the Sounds folder listed, only the html, css, and javascript files are there:

I have tried using the html tag like this:

<audio controls>
    <source src="Sounds/Coin.wav" type="audio/wav">
</audio>

Even this doesn't work, I see the controls show up, but it is greyed out and cannot be interacted with:

I have also tried replacing the backslashes with a normal slash (Because I'm not sure which one is correct in html), but this also didn't help. I have been trying to fix this for days, and I really have no idea what's wrong.

Years later, I've finally discovered the reason I encountered this problem. It has nothing to do with Javascript or whether the HTML file containing the audio was loaded from a local file or a server.

Apparently Chrome (and probably all Chromium-based web browsers as well) cannot play audio files with a bitrate less than 100 kb/s (according to this SO answer), and the audio file I tried to play had a bitrate of 88 kb/s. Therefore it refused to play even if I directly loaded it in Chrome by typing the file URI that points to it (i.e. file:///path/to/Coin.wav).

After using audio editing software to re-encode that audio file to have a bitrate greater than 100 kb/s, it now plays correctly.