Problem with "decodeURIComponent"

However it's not desperately helpful for what you're trying to do. You could try decodeURIComponent(els[1].replace(/+/g,"­ "));

That is exactly what I do to fix it but I thought that decodeURIComponent should already result the same.
It seems that it is my fault. Why are spaces something so special?

application/x-www-form-urlencoded Default. All characters are encoded before sent (spaces are converted to "+" symbols, and special characters are converted to ASCII HEX values)
https://www.w3schools.com/tags/att_form_­enctype.asp

I expected that a space would be

 U+0020		 	Space

not just an "+".

Confusing for me :)

Thank you for your help!

PS: Espruino is very cool :)