How to declare a global variable in Javascript using Jquery

Question

Js file inside I have a function with a particular algorithm.

For reading xml file and transform the data to variable name wordData.

Inside the function has the following line of code:

var wordData = xhr.responseXML.getElementsByTagName (Node1);

I can not set the variable "wordData as a global" outside the function or global Inside the function

function language() {
    lang = "heb";
    if (lang == "heb") {
        thisWord = wordArrayHeb[indeXML];
    }
    else {
        thisWord = wordArrayEng[indeXML];
    }
    alert("language thisWord:=" + thisWord);
}


function setWord() {

    if (xhr.readyState == 4) {
        if (xhr.status == 200) {
            if (xhr.responseXML) {
                var wordData = xhr.responseXML.getElementsByTagName(Node1);
                XMLength = wordData.length;
                for (i = 0; i < XMLength; i++) {
                    wordArrayHeb[i] = wordData[i].getElementsByTagName(Node2)[0].firstChild.nodeValue;
                    wordArrayEng[i] = wordData[i].getElementsByTagName(Node3)[0].firstChild.nodeValue;
                }
                language();

            }
        }
    }

}

the variable thisWord is effected from varible wordData which is not global. Outside the functions, varible thisWord is empty inside the function is ok and it has a value.

Would love help. Thank you!

I changed my answer, i think it should fit you better

André Alçada Padez
– André Alçada Padez

2012-02-03 23:50:55 +00:00
Commented Feb 3, 2012 at 23:50 — André Alçada Padez
– André Alçada Padez, Commented Feb 3, 2012 at 23:50

jrummell · Accepted Answer · 2012-02-03 14:33:45Z

2

Simply declare

var wordData;

outside the function and change your line to:

wordData = xhr.responseXML.getElementsByTagName (Node1);

Hence removing the var declaration.

edited Feb 3, 2012 at 14:33

jrummell

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answered Feb 3, 2012 at 14:31

Sid

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Comments

crazyjoe · Accepted Answer · 2012-02-03 15:28:33Z

2

You can create a global var anywhere in JS by using the window object:

window['wordData'] = xhr.responseXML.getElementsByTagName(Node1);

or

window.wordData = xhr.responseXML.getElementsByTagName(Node1);

Then wordData can be accessed globally. This may not be the best solution for your problem, consider using function arguments and return values instead.

answered Feb 3, 2012 at 15:28

crazyjoe

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1 Comment

centerwow.com Over a year ago

unfortunately it is not working. if any one can help me plz I will appreciate thx. my skype centerWow

André Alçada Padez · Accepted Answer · 2012-02-03 23:50:30Z

0

i think setting it as a global var is not the best choice, if you wish to access wordData inside the function language, you should pass it as a parameter like so:

language(wordData);

and in declaring function language(), just make it so it accepts the parameter:

function language(wordData) {
...
}

edited Feb 3, 2012 at 23:50

answered Feb 3, 2012 at 14:30

André Alçada Padez

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2 Comments

centerwow.com Over a year ago

my code centerwow.com/ajax/ajax1/wordData.rar if you sucasses You will see the word "Eric" below the input serch. Thanks

Chris Bosco Over a year ago

Sort of an antipattern because these can be harder to track down, and usually not scoped the way they are intended

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