Speaking of PHP, XHP predates JSX I believe: https://en.wikipedia.org/wiki/XHP https://en.wikipedia.org/wiki/XHP Same idea: an XML-like syntax for creating ob

Speaking of PHP, XHP predates JSX I believe: https://en.wikipedia.org/wiki/XHP https://en.wikipedia.org/wiki/XHP Same idea: an XML-like syntax for creating object trees typically used to model HTML.