| Product | Official Docs Link | License / Pricing Page | |---------|-------------------|------------------------| | | https://smoothscroll.com/docs/ | https://smoothscroll.com/pricing/ | | smooth-scroll (MIT) | https://github.com/cferdinandi/smooth-scroll | Free – MIT | | smooth-scrollbar | https://github.com/idiotWu/smooth-scrollbar | MIT | | locomotive-scroll | https://github.com/locomotivemtl/locomotive-scroll | MIT | | FullPage.js | https://github.com/alvarotrigo/fullPage.js | GPL / Commercial |
| Reason | Explanation | |--------|-------------| | | The key ties the software to a specific purchaser, making it harder for the code to be shared for free. | | Enable Feature Unlocking | Free versions often limit options (e.g., only vertical scroll, no custom easing). The key unlocks the full feature set. | | Provide Support & Updates | The key is used to verify that the user is entitled to receive bug‑fix releases and technical support. | | Track Usage for Billing | Some vendors base pricing on the number of domains, sites, or page‑views; the key helps enforce those limits. | smoothscroll license key