How to Join Items of Array in Liquid in Shopify

Your online is encountering the inconvenience in showing items or product tags on your product page. If you are using Liquid template language, you can take a look to view these steps below to help you gather items. The tutorial aims to assist you in joining items of the array in Liquid.

Table of content

What is Liquid template language?

Liquid is one of the open-source template languages in Shopify. Liquid is used as the backbone of Shopify to upload dynamic content on the front page. Liquid has been sold since 2006 and now become a good source for a lot of hosted website application such as Jekyll, salesforce desk, and zendesk.

What is the array filter?

Array filter is a function used to create a new array from a provided array including names or items which meet the demand of the condition set by the argument function. In general, the formation of an array looks like this:

sample array filter

Filter feature is used to offer callback function for each character in an array and build a new array that can also give the value back to confirm the true feature of that element. The callback is compatible with three arguments: the value of the element, the index of the element and the array objects being traversed.

In addition, the range of elements demonstrated by a filter is set by the first petition of the callback. If existing elements are changed or eliminated, their value will be passed to the filter hence when filter check these elements, their value is kept.

So, what is the argument function? The function of the argument is to check the condition of each array. There are three arguments:

  • Array: is mentioned above.
  • Index: is processed by the function.
  • Element: is processed by the current element.

Moreover, the return value is also worth mentioning. The return value aims to return a new array consisting of elements that satisfy the condition of the argument filter.

How to join items of the array in liquid

Here is one simple formula that you can follow. By insert join and comma in the code, you are able to create a chain of items in liquid. Input is what you insert and output is the result, what you will see in your product page.

simple formula

Besides, in case that elements that you want to insert are numbers, you can follow the sample below.


{{ product.tags | join: ', ' }}


tag1, tag2, tag3


In conclusion, adding items in one line may make the shopping journey become easier. Buyers will find it more convenient when shopping around because they do not need much time to seek key tags or information. We hope that your concern will be addressed once reading this tutorial.

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