I have no idea what you mean by > surface TypeScript syntax TypeScript syntax is... Javascript (ES 2015 or above) - plus the optional type annotations and

I have no idea what you mean by > surface TypeScript syntax TypeScript syntax is... Javascript (ES 2015 or above) - plus the optional type annotations and some few minor additions like "enum" or decorators. Things like "interface" don't compile to actual code, they only serve the compile-time type checks.