Get variable value from one JS function to another

Question

In my page I get user fb_id in one of function function1() when user perform login action.

Later when user click on some button another function call takes place which calls function2(). I want to fetch value of fb_id in function2(). How can i do it?

structure is like below:

<html>
<head>
<script> 
function fuction2()
{
// some process
var id = fb_it; // Getting fb_it from function1()
}

</script>
</head>
<body>
<script>
function function1()
{
    var fb_it='xyz';
}
</script>

<button type="submit" onclick="function2()"> GetID </button>
</body>

Is it possible or not? If yes then how?

note that you can't declare a variable with int fb_it='xyz';. Use the var keyword. — Denys Séguret
– Denys Séguret, Commented Oct 18, 2013 at 7:20

Denys Séguret · Accepted Answer · 2013-10-18 07:19:54Z

3

No you can't directly access a local variable from an external scope.

What you can do is to store the variable externally :

function fuction2() {
    var id = fb_it; // Getting fb_it from function1()
}
var fb_it;
function function1() {
    fb_it='xyz';
}

answered Oct 18, 2013 at 7:19

Denys Séguret

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1 Comment

user123 Over a year ago

Thanks, I was not knowing global var declaration concept in JS

infidel · Accepted Answer · 2013-10-18 07:20:38Z

1

why don’t you use global variables?

<script>
var x = 0;
function(){
x = 7;
}
function(){
x= 8;
}
</script>

answered Oct 18, 2013 at 7:20

infidel

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Comments

Ronak Patel · Accepted Answer · 2013-10-18 07:26:56Z

1

function function1()
{
    var fb_it='xyz';
return fb_it;
}

function fuction2()
{
// some process
var id = function1(); // Getting fb_it from function1()
}

answered Oct 18, 2013 at 7:26

Ronak Patel

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