How to access to local variable from outside the function?

Question

How to access to local variable from outside the function ?

When pressed, it should alert distance_bottom value, but it's not working, how can I make it work?

<script>
$(window).load(function(){
(function() {    
    var mY, distance_bottom,
        $distance_bottom = $('#distance_bottom span'),
        $element_bottom  = $('#element_bottom');

    function calculatedistance_bottom(elem , mouseY) {
        return Math.floor(Math.sqrt(Math.pow(mouseY - (elem.offset().top+(elem.height()/2)), 2)));
    }

    $(document).mousemove(function(e) {        
        mY = e.pageY;
        distance_bottom = calculatedistance_bottom($element_bottom , mY);
        $distance_bottom.text(distance_bottom);
    });
})();
});
</script>





<script>
function reply_click()
{    
    alert(distance_bottom);
}
</script>

Simple answer: Don't make it local.

Felix Kling
– Felix Kling

2014-10-09 15:03:59 +00:00
Commented Oct 9, 2014 at 15:03 — Felix Kling
– Felix Kling, Commented Oct 9, 2014 at 15:03

Amit Joki · Accepted Answer · 2014-10-09 14:54:24Z

2

You can make it global by prefixing it with window. and removing it from the variable declaration at the top. The below line did the trick

window.distance_bottom = calculatedistance_bottom($element_bottom , mY);

DEMO

answered Oct 9, 2014 at 14:54

Amit Joki

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2 Comments

nomwery geqoilu Over a year ago

yes, i try for 5 time to mark answer , but i must wait for 5 minute.

Felix Kling Over a year ago

Of course the variable is not local anymore. It's impossible to access a local variable outside of the function.

CanIHazCookieNow · Accepted Answer · 2014-10-09 15:00:39Z

0

The way I see it you have two options, first one implies changing the function and the other one doesn't:

1- make that a global variable by not declaring it inside the function with var

2- Access the value on the HTML using javascript/jQuery.

Ex: alert($('#distance_bottom span').html());

(Example in jQuery for simplicity)

answered Oct 9, 2014 at 15:00

CanIHazCookieNow

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2 Comments

CanIHazCookieNow Over a year ago

Yes, Answer edited. Personally I don't like to declare variables in the window/global scope but that's up to you

nomwery geqoilu Over a year ago

Why you don't like to declare variables ?

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