Access function parameter in another function JavaScript

Question

How to access function's parameter in another function that invoke it, here's what I mean

function one(a){
  b();
}

function b(){
  //'a' is the parameter of function one
  if(a>0){
   //do some stuff
  }
}

//the parameter 'a' of function one goes here to catch an event
element.addEventListener('wheel', one);

Can I access function one parameter in function b?

That is like, an absolute basic of JavaScript. See function definitions. — Yassine Badache
– Yassine Badache, Commented Mar 14, 2018 at 7:48
Do not try it at home function one(a) { b() } function b() { console.log(arguments.callee.caller.arguments[0]) } — Yury Tarabanko
– Yury Tarabanko, Commented Mar 14, 2018 at 7:48
Tip: don't think of it in terms of accessing parameters of a higher-up caller. You have no idea where your function will be called from. Make functions self-contained with explicit parameters and return values. — deceze
– deceze ♦, Commented Mar 14, 2018 at 7:51

Dumisani · Accepted Answer · 2018-03-14 07:46:45Z

3

Pass the parameter into b as well

function one(a){
  b(a);
}

function b(a){
  //'a' is the parameter of function one
  if(a>0){
   //do some stuff
  }
}

answered Mar 14, 2018 at 7:46

Dumisani

3,0461 gold badge31 silver badges40 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

arman rozika Over a year ago

Oh, thank you, my mistake is was i didn't pass the 'a' parameter in function b declaration. Thanks !

Dumisani Over a year ago

Yeah we sometimes miss the most basic of things until someone else looks at our code :)

Emon · Accepted Answer · 2018-03-14 07:48:18Z

1

You have to pass a to function b as follows.

function one(a){
  b(a);
}

function b(a){
  //'a' is the parameter of function one
  if(a>0){
   //do some stuff
  }
}

//the parameter 'a' of function one goes here to catch an event
element.addEventListener('wheel', one);

answered Mar 14, 2018 at 7:48

Emon

615 bronze badges

6 Comments

Yury Tarabanko Over a year ago

I'd say because this answer duplicates the one given two minutes before. But who knows why someone did this :)

Manos Kounelakis Over a year ago

Because your answer is almost the same with the previous answer posted before you

Emon Over a year ago

An you think it was intended?

deceze Over a year ago

Note that if that was the reason for the downvote, it's wrong/unfair/incorrect/not what we stand for. If an exact duplicate answer was posted half a year later, that's spurious. But 2 minutes later is perfectly within the range of being written simultaneously, and the answer should be judged on its own merit.

Emon Over a year ago

Should I think ManosKounelakis copied @YuryTarabanko 's comment, it was 1min later. You should not copy comments guys.

|

Collectives™ on Stack Overflow

Access function parameter in another function JavaScript

2 Answers 2

2 Comments

6 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

6 Comments

Your Answer

Sign up or log in

Post as a guest

Related