The JS UI framework is a set of JS-UI frameworks provided for you to develop OpenHarmony applications. The following figure shows the framework architecture.
Figure 1 Framework architecture
The JS UI framework consists of the JavaScript data binding framework, JavaScript runtime, and JavaScript framework.
JavaScript data binding framework
Provides a set of basic data binding capabilities through JavaScript.
JavaScript runtime
Supports parsing and execution of JavaScript code.
JavaScript framework
Provides the framework mechanism of JavaScript APIs and components through the C++ language.
The source code of the framework is stored in /foundation/ace/ace_engine_lite. The directory structure is as follows:
/foundation/arkui/ace_engine_lite
├── frameworks # Framework code
│ ├── common # Common kits
│ ├── examples # Sample code
│ ├── include # Header files
│ ├── module_manager # JS module manager
│ ├── native_engine # JS engine adapter
│ ├── packages # JavaScript implementation
│ ├── src # Source code
│ ├── targets # Configuration files of target devices
│ └── tools # Tool code
├── interfaces # APIs exposed externally
│ └── innerkits # Header files for internal subsystems
│ └── builtin # JavaScript third-party module APIs exposed by the JS UI framework
└── test # Test cases
For details about the APIs, see the JS Application Development.
For details, go to the readme repository:
https://gitee.com/openharmony/docs/blob/master/en/readme/js-ui-framework.md
ace_engine_lite
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