CODEWITHSUNDEEP
javascriptdynamicadobeadobe-analytics
Michael Johns
Michael Johns

Reputation: 441

Why DTM Data Element is being called twice?

I have a data element using a custom script with a default value of "_Not_Set_". The code in the data element is:

var elemNavValue = _satellite.readCookie('navElemName');
console.log("spot 1 - cookie value is " + elemNavValue);
if ((elemNavValue !== '')&&(elemNavValue !== undefined)&&(elemNavValue !== '_Not_Set_')){
    console.log("spot 2 - cookie value is " + elemNavValue);
    _satellite.setCookie('navElemName','_Not_Set_',1);
    return elemNavValue;
}else{
    console.log("spot 3 - cookie value is " + elemNavValue);
    _satellite.setCookie("navElemName",'_Not_Set_',1);
    return '_Not_Set_';
}

When the page loads, I see the data element runs twice. I get the following output in the console.

spot 1 - cookie value is undefined 
spot 3 - cookie value is undefined
spot 1 - cookie value is _Not_Set_ 
spot 3 - cookie value is _Not_Set_

This is the only data element I have declared and it is only called in the global section for Adobe Analytics tool and assigned to a prop and eVar. I have no rules created. Why is this and how do I fix this issue?

Upvotes: 4

Views: 631

Answers (1)

BrettAHale
BrettAHale

Reputation: 800

Instead of being created once on page load, Data elements run each time they are called. So, if you are using them in a prop and evar,it will be called twice. If you run

_satellite.getVar('data element name')

in the browser console, you would see the code run again. To stop this behavior, copy the evAR into the prop or vice versa.

Upvotes: 4

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