Getting return value of inner function in javascript

Question

Here is my code i want alert to give (some data) value. which is of inner function it give undefined value

alert(f1());
function f1(){
  f2(function (){
    return "some data";    
  });
}
function f2(f4){
  // some code
}

visit : https://jsfiddle.net/dvdhyttr/8/

i want alert get value (some data). but getting undefined.

You have to be more descriptive about what you want, the question is unintelligible. Is this what you want? — Munim Munna
– Munim Munna, Commented Mar 30, 2018 at 19:23

Ele · Accepted Answer · 2018-03-30 19:23:48Z

1

Two main issues

Missing return within the function f1
Within function f2 you need to return the result of calling the function f4.

alert(f1());

function f1() {
  return f2(function() {
    return "some data";
  });
}

function f2(f4) {
  return f4()
}

answered Mar 30, 2018 at 19:23

Ele

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Comments

CertainPerformance · Accepted Answer · 2018-03-30 19:20:21Z

0

You need to assign the return values of the functions to variables in the outer function and return them, all the way up to alert(f1());.

alert(f1());

function f1() {
  const resultOfF2 = f2(function() {
    return "some data";
  });
  return resultOfF2;
}

function f2(f4) {
  return f4();
  // some code
}

answered Mar 30, 2018 at 19:20

CertainPerformance

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Getting return value of inner function in javascript

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