We often get asked how to add the cart.js script tag (that generates the lightbox cart on your website) to Wordpress.
Most Wordpress fields strip <script> tags, so the best way to add the cart.js line is to add it to your theme header so it will be available on every page and post.
The Script Tag:
Adding it to your Theme Header:
1. Log in to your wordpress admin
2. Go to the Appearance menu in the left column and select "editor":
3. Find the Header.php file and insert the complete script tag above right before your closing HEAD tag:
4. Save header.php and check your site. The script tag for cart.js should appear right before your closing head tag on every page.
Note: Some themes have multiple headers like "header-post, header-fullwidth, etc." Generally, you can ignore these and put the script tag in ONLY the header.php file, which is the standard wordpress header that is loaded on every page.