JavaScript uses the new Error () Hack method to get the function name from the inside of the body

' Use strict 'function  getfuncname () {    var  callername;    {        =/(\w+) @|at ([^ (]+) \ (/g;        Reg.exec (new Error (). stack);  // run exec once and run to the second match        Let Regresult = Reg.exec (new  Error (). stack);         = Regresult[1] | | Regresult[2];    }    Console.log (callername);}; function Functoknow () {   getfuncname ();}; Functoknow ();   // Functoknow

JavaScript uses the new Error () Hack method to get function names from within the body of the function