Javascript force GC collection? / Forcefully free object?

Question

I have a js function for playing any given sound using the Audio interface (creating a new instance for every call).

This works quite well, until about the 32nd call

Answer 1

I see at least one (or two) flaws:

snd = new Audio(url);

has no var in front of it, so snd is assigned to the global scope. That's usually not what you want: it clutters the global name space and if another script (e.g., an extension) incidentally uses snd, things will be a mess.

And that's also why

delete snd;

doesn't work: you can't delete global variables:

When declared variables and functions become properties of a Variable object — either Activation object (for Function code), or Global object (for Global code), these properties are created with DontDelete attribute.

So, use

var snd = new Audio(url);

instead. BTW, you can't force the JavaScript engine to do garbage collection.