javascript - How to get a functions's body as string?

Question

I want to know how to convert a function's body into a string?

function A(){
  alert(1);
}

output = eval(A).toString() // this will come with  function A(){  ~ }

//output of output -> function A(){ alert(1); }

//How can I make output into alert(1); only???

Answer 1

If you're going to do something ugly, do it with regex:

A.toString().match(/function[^{]+{([sS]*)}$/)[1];