Bespoke logic, safely sandboxed
When configuration isn't enough, Sell.Do lets you safely inject custom JavaScript to tailor the UI and behaviour — like Zoho Canvas, but governed. Scripts run in a sandbox with a scoped SDK, so you get flexibility without compromising security.
Inside Custom JavaScript
Event hooks
Run code on lead and booking events.
Sandboxed runtime
Secure, isolated execution.
Custom calculations
Bespoke pricing and scoring.
Validations
Enforce your business rules.
Integrations
Call external APIs securely.
Versioned
Safe deploys and rollbacks.
How teams use Custom JavaScript
Customise the UI beyond config
Add bespoke widgets, validations and interactions where no-code reaches its limit.
React to events
Hook into record and UI events with the scoped Sell.Do SDK.
Keep it safe
Scripts run in an iframe sandbox with scoped tokens and a four-eyes review before going live.
Version and roll back
Every script is versioned, so you can review changes and revert instantly.
AI-assisted scripting
Describe the behaviour you want and Jarvis drafts the script against the SDK — you review and approve before it ships.
See Sell.Do live, then go live in 7 days
A tailored walkthrough for your projects, your team and your pipeline — book a 30-minute demo and be live in as little as 7 days.