Google Tag Manager Parse Error. Primary Expression

Question

I am trying to save this Custom Javascript Variable within Google Tag Manager and return this error each time:

Error at line 2, character 4: Parse error. primary expression expected

var prodID = function pID() {
return document.querySelector(".no-display > input[name=product]").value;
}();

Can someone help me? I believe I have a primary expression.

kamituel · Accepted Answer · 2016-02-23 08:14:21Z

2

To fix the issue in Google tag manger, I simple re wrote the code to be :

function() {
  return document.querySelector(".no-display > input[name=product]").value;
}

edited Feb 23, 2016 at 8:14

kamituel

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answered Sep 6, 2015 at 2:50

Spencer Gallardo

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1 Comment

codener Over a year ago

Your issue was that you were immediately invoking your function (see last line of the code snippet in the question). I had the same error message when I failed to wrap the code in a function() definition.

ted_zarzeczny · Accepted Answer · 2017-04-07 17:39:40Z

1

All code in a custom javascript variable should be within function() {}, or you will get this error.

Here's the documentation from Google:

This field should be a JavaScript function that returns a value using the 'return' statement. If the function does not explicitly return a value, it will return undefined and your container may not behave as expected. Below is an example of this field:

function() {
     var now = new Date();
     return now.getTime();   
}

answered Apr 7, 2017 at 17:39

ted_zarzeczny

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