Budget: 5000 UAH Deadline: 30 days
Updating jQuery to a classic version like OpenCart 1.5.5.1.2 is not just a matter of replacing one line; it is a full "jump through the ages." Version 1.5 uses jQuery 1.7.1 by default, and transitioning to 3.x will inevitably cause conflicts with old methods (for example, .live() or .toggle()), which modern libraries do not support.
1. Connecting jQuery 3.x and Migrate
For a safe transition, we will use jQuery Migrate, which will restore support for deprecated APIs and output warnings in the browser console about which specific script on the site requires modifications.
You need to edit the file: catalog/view/theme/[your_theme]/template/common/header.tpl
Important: The old connection line (usually jquery-1.7.1.min.js) must be completely removed. Make sure the new block is placed above all other JS scripts of the modules.
2. Testing Plan (functional checklist)
After updating to jQuery 3.x, the main "breakages" usually occur in animations and dynamic loading. Check the following nodes:
Cart: Adding a product to the cart (ajax), updating the quantity, and removing it. In OC 1.5, the deprecated method .live() is often used, which Migrate should intercept.
Checkout: Functionality of the checkout steps. If any step does not open, there will be an Uncaught TypeError error in the console.
Sliders and banners: Old versions of Nivo Slider or Carousel often break when updating jQuery.
Admin panel: If you are updating jQuery in the admin panel as well, check the filtering of products and the functionality of autocomplete in the product card.
Tabs: Switching between the "Description," "Specifications," and "Reviews" tabs on the product page.
Code Analysis (free)
I can perform a free analysis of your backend to identify specific lines of code that will cause fatal errors after the update. For this, I will need access to your theme files.
Would you like me to prepare a custom JS script that will highlight specific files and line numbers in your template using deprecated jQuery syntax in the browser console?