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Core Mechanisms for Extending Apps

The first topics in this section describe how to configure app extensions in your manifest.json and explain extension points and controller extensions, which are the preferred standard approaches for customizing applications.

You’ll also find a section containing some further extensions. Consider these for specialized view customizations or when the standard approaches aren’t sufficient.

Another topic covers your options for customizing application text.

• Configuration in the manifest.json
  OpenUI5’s extension configuration works through a Component’s manifest.json file, where you define your customization logic within the sap.ui5/extends/extensions section. This declarative approach allows you to specify which views, controllers, or UI elements you want to extend or replace, without the need to modify the original application code.
• Extension Points
  Extension points are locations in application views where you can insert custom content. These points are pre-defined by the application.
• Controller Extensions
  Controller extensions enable you to enhance existing controller functionality without modifying the original application code, making them one of the most versatile and commonly used extension mechanisms in OpenUI5. This approach allows you to add custom business logic, override existing methods, and integrate seamlessly with the standard controller lifecycle.

• [Further Extensions](further-extensions-c44813d.md “”)

• Text Customization
  When extending OpenUI5 applications, you often need to add custom localized texts or override existing ones. OpenUI5 provides flexible mechanisms for enhancing resource models with additional localization files, allowing you to integrate multilingual content.

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