What is the essence of components in vue

Vue components are reusable, independent, encapsulated JavaScript objects, including data, templates and methods. Components provide reusability, independence, maintainability, and extensibility. There are single file components (SFC) and multi-file components in Vue. When a component is added to a Vue instance, it is created as an instance, containing its data, methods, and a reference to the template.

The essence of components in Vue

In Vue.js, components are reusable, independent and encapsulated Blocks of code can create more complex and maintainable applications. The essence of the component is:

A JavaScript object that encapsulates data, templates and methods

Data: The component defines its own state, that is Data that determines how the component is rendered.

Template: A template is an HTML fragment that specifies the rendered content of a component. Its syntax is similar to standard HTML, but contains Vue directives.

Methods: Components can respond to user interaction or perform other operations by defining methods. These methods are called inside the component.

Advantages of components

• Reusability: Components can be reused by multiple views and multiple applications, which improves Improved code reusability.
• Independence: Components are independent, they are only responsible for implementing their own functions and are decoupled from other parts of the application.
• Maintainability: Components organize code into smaller modules, making the application easier to understand and maintain.
• Extensibility: Components can be combined together to create more complex applications without significantly rewriting code.

Types of components

There are two types of components in Vue:

• Single File Component (SFC ): Define data, templates and methods in a single file.
• Multiple file components: Define data, templates and methods in different files.

Instance of component

When a component is added to a Vue instance, it will be created as an instance, which contains the component's data and methods and a reference to the template. Each component instance is independent and has its own data state.

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