是否可以在 javascript 中获得父 function 名称？

Question

class B{

  constructor()
    // how to determine the function name in which this object was created?
  }

}


function a(){
  let b = new B();

}

In the constructor of BI need to find out in which function it was called. I want the function name, which is a in the given example.

Is this possible with js?

Answer 1

create an Error and use its stack;

function foo() {
  var err = new Error();
  var stack = err.stack; // This is an array of stack frames
}

Answer 2

Yes, Error.stack...

 class B { constructor() { // how to determine the function name in which this object was created? const ex = new Error() console.log('call from [', ex.stack.split('\n')[2].trim().split(' ')[1], ']'); } } function a() { let b = new B(); } function helloWorld() { let b = new B(); } a(); helloWorld();

Answer 3

Yes, with arguments.callee.caller.name .