CODEWITHSUNDEEP
javascript
Iladarsda
Iladarsda

Reputation: 10696

How to get value from outside of the function in javascript?

How can I get a var value from another function?

jQuery:

$(document).ready(function() {
    function GetBiggestValue() {
        var value = 0;
        $('#tagCloud li a').each(function() {
            if (value < $(this).attr('value')) {
                value = $(this).attr('value');
            }
        });
        var FullValue = value;
    }

    function Abc(){
        console.log(FullValue);
    }

    Abc();
});

HTML:

<ul id="tagCloud">
    <li><a href="#" value="1">Val 1</a></li>
    <li><a href="#" value="2">Val 2</a></li>
    <li><a href="#" value="3">Val 3</a></li>
    <li><a href="#" value="4">Val 4</a></li>
</ul>

Upvotes: 0

Views: 6494

Answers (4)

hungryMind
hungryMind

Reputation: 6999

declare outside the function

var value = 0;
$(document).ready(function() {
function GetBiggestValue() {
        value = 0;
        $('#tagCloud li a').each(function() {
            if (value < $(this).attr('value')) {
                value = $(this).attr('value');
            }
        });

    }
    function Abc(){
        console.log(value);
    }
    Abc();
});

or return value

Upvotes: -1

miqbal
miqbal

Reputation: 2227

May be you want to use this value anywhere. So call GetBiggestValue() function and assign it a variable.

function GetBiggestValue() {
    var value = 0;
    $('#tagCloud li a').each(function() {
        if (value < $(this).attr('value')) {
            value = $(this).attr('value');
        }
    });
    return value;
}

var FullValue = GetBiggestValue();

function Abc(){
    console.log(FullValue);
}

Upvotes: 1

Richard Dalton
Richard Dalton

Reputation: 35793

Just return the value from the GetBiggestValue function:

function GetBiggestValue() {
    var value = 0;
    $('#tagCloud li a').each(function() {
        if (value < $(this).attr('value')) {
            value = $(this).attr('value');
        }
    });
    return value;
}

function Abc(){
    console.log(GetBiggestValue());
}

Upvotes: 0

Stefan Gehrig
Stefan Gehrig

Reputation: 83622

You cannot access variables from other contexts than your own or one of the parent contexts. The FullValue variable is private to the GetBiggestValue() function because you used the var statement to define the variable. The correct procedure in your case would be to return value from the GetBiggestValue() function (although one might come up with another solution using a variable outside GetBiggestValue() to store the value).

$(document).ready(function() {
    function GetBiggestValue() {
        var value = 0;
        $('#tagCloud li a').each(function() {
            if (value < $(this).attr('value')) {
                value = $(this).attr('value');
            }
        });
        return value;
    }

    function Abc(){
        console.log(GetBiggestValue());
    }
    Abc();
});

Upvotes: 3

Related Questions