Definition
A Component (Visualforce) is a reusable, custom UI element built using Visualforce markup (defined with
Real-World Example
When a senior developer at TerraForm Tech needs to streamline operations, they turn to Component, Visualforce to solve a complex business requirement that cannot be addressed with declarative tools alone. They implement Component, Visualforce with proper error handling, write 98% test coverage, and document the solution for future maintainers. The code passes security review on the first attempt.
Why Component, Visualforce Matters
A Visualforce Component is a reusable, custom UI element built using Visualforce markup. Components are defined inside <apex:component> tags and can be inserted into Visualforce pages or other components, promoting code reuse for UI elements that appear in multiple places. They support attributes (passed in by the page using the component), have their own controllers (for component-specific logic), and can include any standard Visualforce markup inside their definition.
Visualforce Components are the legacy equivalent of what Lightning Web Components do in modern Salesforce development. Both provide reusable UI building blocks, but LWC is the recommended framework for new development. Visualforce Components remain in use in orgs maintaining legacy codebases, and the patterns are similar enough conceptually that developers familiar with LWC can usually understand Visualforce Components without much retraining. Custom components can also be packaged for distribution on the AppExchange, though this is less common today than it was before LWC.
How Organizations Use Component, Visualforce
- •TerraForm Tech — Maintains a library of Visualforce Components for legacy pages: custom date pickers, formatted address displays, branded header components. Each component is reused across many pages, so improvements to a component propagate to every page that uses it.
- •CodeBridge — Built a custom Visualforce Component that renders a styled approval status indicator. The component is used on a dozen Visualforce pages and centralizes the styling, so a brand refresh requires changing only the component.
- •Quantum Labs — Migrated frequently used Visualforce Components to LWC during their modernization project. The conceptual model carried over, but the syntax and lifecycle were different enough that each component required deliberate redesign.