The order in which files are parsed when the vue3 project is running

When the Vue 3 project is running, the parsing order of files is as follows:

1. First, Vue 3 parses and executes main.jsthe file. This is the entry point file for the entire application. Typically, main.jsa Vue application instance is created in and the root component is mounted on the specified DOM element.

2. In main.js, you can import other JavaScript modules, stylesheets or resource files. These files may include routing configuration files, global state management files, etc.

3. Next, Vue 3 will parse the root component file. The root component file is usually named App.vue. It is a Single File Component, including templates, scripts and styles.

4. When parsing the root component file, Vue 3 will parse and process the subcomponents in it at the same time. Subcomponents can be introduced directly in the root component or loaded lazily through dynamic loading.

5. When parsing and processing components, Vue 3 <script>compiles based on the sections in the component files. This involves compiling Vue templates into render functions and handling the component's options and lifecycle hooks.

6. After compilation is completed, Vue 3 will perform corresponding operations based on the component's options and life cycle hooks. For example, create component instances, call life cycle hook functions, set responsive data, etc.

7. Finally, Vue 3 will mount the rendering result of the component to the specified DOM element and start listening for user interaction events and data changes.

It should be noted that Vue 3 uses a more efficient compiler and rendering engine to improve performance and rendering speed. At the same time, Vue 3 also introduces a new Composition API, making the logic and state management of components more flexible and maintainable.

To sum up, the file parsing sequence when the Vue 3 project is running can be summarized as: parsing main.js-> parsing and processing the root component and its subcomponents -> compiling component templates and options -> executing life cycle hook functions -> mounting component rendering results - > Monitor user interaction events and data changes.