How can I convert a unicode hex value to a string character in Javascript?

Question

I have data that I have scraped from html which has in it unicode hex references. For example a string may contain

"Store below 25°C." or "She's not the one"

How can I convert this Unicode hex reference to a string? I want to use Node to return strings like: "Store below 25°C." or "She's not the one".

Thanks in advance