Visualforce

Visualforce is a web development framework created by Salesforce. It allows developers to build custom user interfaces for the Salesforce platform. Visualforce pages are composed of Visualforce markup, which is an XML-based tag language, and can include standard HTML, JavaScript, and CSS. This framework enables the creation of sophisticated and tailored user experiences that go beyond the standard Salesforce interface.

The core concept of Visualforce is its component-based architecture. Developers can create reusable components that encapsulate specific functionalities or UI elements. These components can then be assembled into complex pages. The framework integrates seamlessly with Salesforce's data model, allowing developers to easily bind UI elements to custom or standard Salesforce objects and fields. This data binding facilitates the display and manipulation of Salesforce data directly within custom pages.

Visualforce also supports server-side controllers written in Apex, Salesforce's proprietary programming language. These controllers handle the business logic, data retrieval, and data manipulation for Visualforce pages. This separation of concerns between the UI (Visualforce page) and the logic (Apex controller) promotes maintainability and testability of custom applications. The framework is used extensively for building custom applications, portals, and extensions within the Salesforce ecosystem, offering a powerful way to extend the platform's capabilities.