How to modify theme's JavaScript file in Shopify

Drive 20-40% of your revenue with Avada

Get Started

Modifying your Shopify store’s theme JavaScript file can feel overwhelming, especially if you’re not a coding expert. But understanding how to do it is key to customizing your store’s functionality. This guide breaks down the process into simple steps, helping you easily modify the theme’s JavaScript file in Shopify without the usual stress.

How to modify theme’s JavaScript file

• Step 1: Go to themes
• Step 2: Edit the code
• Step 3: Come to Assets directory
• Step 4: Add following code
• Step 5: Find code with VariantCallback function
• Step 6: Replace code
• Step 7: Save

Step 1: Go to themes

Firstly, at the admin’s dashboard, the Shopify store owners click the Online Store then choose the Themes.

Step 2: Edit the code

In this step, the users select their expected themes to edit. After that, admins click Actions and then Edit code.

Step 3: Come to Assets directory

Find to the Assets directory, the users click theme.js or theme.js.liquid.

Step 4: Add following code

Next, the users enables copying this following code to the bottom of the file:

$(document).ready(function() {
  if( typeof(productOptions ) != "undefined" ){
    for(i=0;i<productOptions.length;i++) {
      $('.single-option-selector:eq('+ i +')')
      .filter(function() {
        return $(this).find('option').length > 1
      })
      .prepend('<option value="">Pick a ' + productOptions[i][i] + '</option>')
      .val('')
      .trigger('change');
    }
  }
});

Step 5: Find code with VariantCallback function

With VariantCallback function, the Shopify store owners could the

var imageId = variant.featured_image.id;

Step 6: Replace code

The users replace this above code with the following codes. However, this step is optional because it could includes some versions of Boundless which do not include the line of code to be replaced. In case that the users cannot find the code, the online sellers can skip this step.

var imageId = variant.image.id;

Step 7: Save

Finally, the users save all the changes by clicking Save

Conclusion

To wrap things up, modifying your Shopify theme’s JavaScript file is essential for adding dynamic features to your store. The process may seem technical, but with the steps provided, you can confidently make the necessary changes. Remember, this guide is just the beginning—explore other resources to further enhance your store’s functionality. Take control of your theme’s customization and give your Shopify store the edge it needs to stand out.