This article explains how to install the Shopify store theme code required to display the Check ETA feature. Once enabled, a button will be added to the store that when clicked will display the ETA date of the earliest Purchase Order that can fulfil the order.
You can configure:
- The text on the button
- The text displayed before the ETA date e.g. Warehouse Delivery Date
- The text displayed if an ETA is unknown

📋 Note: Modifications to your Shopify theme should only be done by an experienced developer.
Installation
Download Pre-Order asset files
To install the Shopify Pre-Order ETA feature, download the assets using the link above and follow the steps for each of the Shopify theme files listed below.
Instructions are included in the file "rex-product-eta.md"
Add the following code to the end of the header:
{% include 'rex-product-eta' %}
- Expand the Assets section
- Click Add a new asset
- Click the Choose File button on the Upload a File tab
- Navigate to where you have downloaded the files
- Select rex-product-eta.liquid
- Click Open
- Click Upload asset
- The file will be uploaded.
- Expand the Assets section
- Click Add a new asset
- Click the Choose File button on the Upload a File tab
- Navigate to where you have downloaded the files
- Select rex-product-eta.js
- Click Open
- Click Upload asset
- The file will be uploaded.
- Expand the Assets section
- Click Add a new asset
- Click the Choose File button on the Upload a File tab
- Navigate to where you have downloaded the files
- Select rex-product-eta.css
- Click Open
- Click Upload asset
- The file will be uploaded.
Frequently Asked Questions
For a product to be available for pre-order, ensure you have configured the following items correctly:
- Shopify Store
- Product
- Purchase Orders
Follow the instructions for Enabling Shopify Pre-Orders for more information.