Parsing nested extensions

[matteomelotti]

Add new extensions type, manage parsing nested extensions, updated gpx file example

[We-Gold]

I like the approach you have taken here, this should improve the behavior of the library. There is a minor bug in the current implementation.

The section below is in the wrong order in the ternary operator.

const value = isNaN(+textContent) ? parseFloat(textContent) : textContent

It should be:

const value = isNaN(+textContent) ? textContent : parseFloat(textContent)

The issue with the current segment is that it attempts to parse the textContent as a float if and only if the textContent is NaN, which is the opposite of the intended behavior. I tried reversing it and got the intended behavior.

I manually tested the code and it seems to be working outside of that issue. I hope to add a better testing system to the library in the future, but for now that will have to do. Anyway, once you make that fix I'll be happy to merge in the change.

[matteomelotti]

Yes I confirm the issue, thanks.
I was using a different function isNumber so I forgot to switch

[We-Gold]

Great. Once you make the fix, I'd be happy to merge it in.

[matteomelotti]

@We-Gold pushed the fix, thanks!