CODEWITHSUNDEEP
javascriptajax
centerwow.com
centerwow.com

Reputation: 67

How to declare a global variable in Javascript using Jquery

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!

Upvotes: 0

Views: 1936

Answers (3)

Andr&#233; Al&#231;ada Padez
Andr&#233; Al&#231;ada Padez

Reputation: 11588

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) {
...
}

Upvotes: 0

crazyjoe
crazyjoe

Reputation: 471

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.

Upvotes: 2

Sid
Sid

Reputation: 7631

Simply declare 

var wordData;

outside the function and change your line to:

wordData = xhr.responseXML.getElementsByTagName (Node1);

Hence removing the var declaration.

Upvotes: 2

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