How to Create A Global Variable In Shopify?

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In Shopify, global variables can be created by using Liquid, which is the templating language used in Shopify themes. To create a global variable, you need to define it in the theme files to make it available throughout the theme.


One common method is to create a new Liquid file in the "sections" or "snippet" folder of the theme and define the variable using Liquid syntax. For example, you can set a global variable named "site_name" and assign it a value of your website's name like this:

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{% assign site_name = "My Shopify Store" %}


Once the global variable is defined, you can use it in any template file or section of your theme by referencing the variable with double curly braces like this:

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Welcome to {{ site_name }}!


This will output:

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Welcome to My Shopify Store!


By defining global variables in this way, you can easily customize and manage key pieces of information across your entire Shopify theme.

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How to access a global variable in Shopify?

To access a global variable in Shopify, you can use the {{ global }} liquid object. Global variables in Shopify represent values that are site-wide and can be accessed from any template or page within your Shopify store.


Here is an example of how to access a global variable in a Shopify template file:

  1. Open the template file where you want to access the global variable.
  2. Use the {{ global.variable_name }} liquid object to access the value of the global variable. Replace variable_name with the name of the global variable you want to access.


For example, if you have a global variable named site_title that stores the title of your store, you can access it in a template file like this:

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<h1>{{ global.site_title }}</h1>


This will output the value of the site_title global variable in the header of your store.


Keep in mind that global variables in Shopify are set up in the Shopify admin under Settings > General > Store details. Here, you can define and manage global variables that can be accessed throughout your store.


What is the impact of global variables on scalability of Shopify store?

Global variables can have both positive and negative impacts on the scalability of a Shopify store.


Positive impacts:

  1. Simplified code: Using global variables can simplify the code and make it easier to read and maintain. This can help streamline development and improve efficiency, which can ultimately contribute to scalability.


Negative impacts:

  1. Slower performance: Global variables can lead to slower performance as they are initialized once and then persist throughout the entire application. This can lead to memory bloat and slower processing times, which can have a negative impact on scalability.
  2. Potential conflicts: Global variables can lead to conflicts and unintended consequences if not managed carefully. Since global variables are accessible across the entire application, changes made to them in one part of the code can have unintended effects on other parts of the code.


Overall, while global variables can provide some benefits in terms of code simplicity and ease of use, their potential negative impacts on performance and potential conflicts should be carefully considered when designing and scaling a Shopify store. It is important to strike a balance between using global variables for convenience and ensuring that they do not hinder the scalability and performance of the application.


What is the difference between a local and a global variable in Shopify theme?

In Shopify themes, a local variable is a variable that is available only within a specific context or scope, such as within a specific template file or a specific section or block of code. Local variables are typically used to store temporary data or information that is only needed within that specific context.


On the other hand, a global variable is a variable that is accessible and available throughout the entire theme or store. Global variables are typically used to store data or information that needs to be accessed and used in multiple locations or contexts within the theme.


In general, local variables are more limited in scope and are only available within specific parts of the theme, while global variables are more widely accessible and can be used throughout the theme.


How to assign a value to a global variable in Shopify?

In Shopify, global variables are typically used within liquid code to store and access data throughout a theme. To assign a value to a global variable in Shopify, you can use the assign tag in a theme file (such as a section, template, or snippet).


Here's an example of how you can assign a value to a global variable in Shopify:

  1. Open the theme file where you want to assign the global variable (e.g., theme.liquid or a specific section file).
  2. Use the following syntax to assign the value to the global variable:
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{% assign my_global_variable = "Hello, world!" %}


  1. You can now use the global variable my_global_variable throughout your theme to access the assigned value. For example, you can output the value using the following liquid code:
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{{ my_global_variable }}


By assigning a value to a global variable in this way, you can store and retrieve data across different sections, templates, and snippets within your Shopify theme.


How to name a global variable in Shopify code?

In Shopify code, global variables are typically declared at the beginning of the file. To name a global variable in Shopify code, you can follow these conventions:

  1. Use all capital letters and separate words with underscores to create a descriptive and easily recognizable name. For example: GLOBAL_VARIABLE_NAME.
  2. Prefix the variable name with a keyword that helps indicate its purpose or scope. For example: SHOPIFY_GLOBAL_VARIABLE_NAME.
  3. Make sure the variable name is clear and concise, reflecting its intended use within the codebase.
  4. Avoid using generic or ambiguous names that may lead to confusion or conflicts with other variables in the code.


Here is an example of how you can name a global variable in Shopify code:

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{% assign MAX_PRODUCTS_PER_PAGE = 10 %}


In this example, the variable name MAX_PRODUCTS_PER_PAGE is written in all capital letters with underscores to separate words, making it easily identifiable as a global variable.

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