Definition
A legacy Salesforce feature (deprecated) that allowed administrators to attach JavaScript code to custom buttons and links, executing client-side scripts when clicked. Replaced by Lightning actions and LWC in Lightning Experience.
Real-World Example
a Salesforce developer at CodeBridge uses onClick JavaScript to create a robust integration between Salesforce and an external system. Using onClick JavaScript, the developer builds an efficient solution that syncs data in near real-time, handles error scenarios gracefully, and includes detailed logging for troubleshooting.
Why onClick JavaScript Matters
onClick JavaScript is a legacy Salesforce feature (deprecated) that allowed administrators to attach JavaScript code to custom buttons and links, executing client-side scripts when clicked. JavaScript buttons do not work in Lightning Experience and are not supported for new development.
onClick JavaScript was widely used in Classic for custom button actions, pop-ups, and quick updates. Lightning Experience doesn't support JavaScript buttons, so organizations migrating to Lightning must replace them with Lightning actions, Flow screen actions, or Lightning Web Components. This is often one of the biggest migration tasks.
How Organizations Use onClick JavaScript
- •Skyline Consulting — Migrates onClick JavaScript buttons to Lightning actions and Flow during Classic-to-Lightning migration.
- •TerraForm Tech — Replaced all JavaScript buttons with LWC and Flow as part of Lightning adoption.
- •CodeBridge — Teaches JavaScript button migration as a key Lightning migration skill.