8/3/2023 0 Comments Anylogic get variable valueThe other, common case of variable resolution has to do with trigger conditions. This means that it’s very difficult to identify which macro() parameter is associated with which variable, which is why debugging has become an all-important tool in understanding how variables work. The parameter that is given to the macro() method is basically ‘gtm’ plus a unique sequential number. The tag code is executed, and all variable functions within are resolvedĪs you can see, a variable is actually a method of the google_tag_manager object. Variable calls are transformed into the actual function calls ( google_tag_manager.macro('gtm10')) When a trigger causes a tag to “fire”, the process is actually this: If the variable is referenced in a tag, the variable is resolved every single time the tag fires. If the variable is referenced in a trigger that is attached to a tag, the variable is resolved every single time an event key is pushed into dataLayer. If the variable is referenced in a trigger that is not attached to any tags, the variable is never resolved. If the variable is not attached to a trigger or a tag, the variable is never resolved (unless, of course, the variable is referenced from some other variable that is resolved). Variables are resolved according to the following process: Even the ones you’ve typed in manually into Custom HTML tags and Custom JavaScript variables! This is incredibly time-saving, since you don’t have to go through every single reference, rewriting the code to match the new name. One cool thing that GTM does for you is this: when you change a variable name, all references to the variable are automatically updated. Retrace your steps and fix any broken links. It’s also possible that you’ve jumped the gun and called a variable, but then you forgot to create the variable itself. So remember to check all the places where you’ve manually typed a variable call. Technical details and how-toįor you to be able to invoke a GTM variable, you need to be working in a script context, or the template field needs to support variable references.Ī supported template field can be uncovered by looking for the little variable symbol next to a field: I hope this guide will help you get to the bottom of variables, and encourage you to find your own ways of performing magic tricks with your GTM container. They add a level of flexibility and customization that can really make your tagging lean, efficient, performance-driven, and time-saving.Īt the same time, variables can be difficult to fathom, especially when we get to the technical details (see below), or when we try to tackle the amazingly multi-faceted and deviously difficult Custom JavaScript variable. When skeptics ask me what is the main benefit of having GTM on the site, I always end up talking about variables. I will go so far as to say that variables can make or break GTM. This is something I’ve actually written a #GTMtips post about this. Thus, whenever the variable name is invoked using the correct syntax, the tracking code returned by the Constant variable will be included in the appropriate tag field. Here, instead of always typing the tracking code for your web property (UA-XXXXXX-X) into each GA tag, you can create a Constant variable, which stores the value. One of the first things all Google Tag Manager containers which run Google Analytics tags should do is this: But in an approved context, the syntax would run the underlying function of the variable with the name “variable name”, and pass the value returned by that function to its execution context (the tag, trigger, or variable where the syntax was used). In GTM, invoking the variable function is done with a specific syntax:Īs we’ll learn later on, you can’t invoke variables wherever you’d want to. Thus, the idea is very similar to the broader concept of computing variables explored in the previous paragraph. In Google Tag Manager, the term variable is used to denote a helper function that your tags, triggers, and other variables can invoke to retrieve values from. The alternative would be to treat each representation of the same value as unique, temporary, and disposable, creating a mass of redundancy and inefficiency, and making the current computing landscape a whole lot different. This is a significant achievement in efficiency, because it means that values can be reused across functions, procedures, and environments. In computing terms, variables denote compartments in computer memory, which are reserved for storing values. Subscribe to the Simmer newsletter to get the latest news and content from Simo Ahava into your email inbox!
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