How can you get away from using Function (new Function) in JavaScript by writing the same "normal function"?

Question

JavaScript

I use Function when writing a template engine in order to replace text with logic , which is very convenient and makes the code short, but such code becomes poorly supported when the logic becomes more complicated.
We are talking about something similar, only with more complex logic (this is a very readable example):

var template = function(a) {
  return Function("o","o="+JSON.stringify(a).replace(/<%=(.+?)%>/g,'"+($1)+"').replace(/<%(.+?)%>/g,'";$1\no+="')+";return o")
};

Is it possible to rewrite it somehow? Any ideas?
Thanks in advance:)

Answer 1

Function is used to "compile" an expression/functional, so you can directly execute the desired code, instead of "interpreting" it, which gives better performance and saves memory.
Yes, you can make a similar functional by storing data in closed variables, I interpret the functional, but it will work slower.