Simple Template Function

In programming web applications is often useful to be able to have a templating function.

This is a templating function (rather a library) that aligns with avoiding complexity, safety by design and separation of concerns.

This is how one would use such a template:

var MAINtemplate=
`<p>$Name$ has $$$Amount$ in their bank account.</p>$
 <p>----</p>
`;

function MAINrun(){
   var Body = document.querySelector('body');
   var Data = [{Amount : 55, Name : " Fred " }, {Amount : 45 , Name : "Mary"}];
   Body.innerHTML = TEMexpand(Data, MAINtemplate);
}

READYevent(MAINrun);

This code would produce:

Fred has $55 in their bank account.
----
Mary has $45 in their bank account.
----

TEMexpand is implemented couple of dozen lines of code. You can get the source here.

So why use this instead of a fully featured templating system like Mustache?