You are working in your Lightning Web Component and still wondering why in this world we use @track or @api decorator in LWC. So let’s explore it ! @track and @api both are decorators we use to manage the reactivity and accessibility of properties in a component. below table will help you to clearly understand the difference between them.
| Properties | ||
|---|---|---|
| Purpose | This decorator is used to make a private property reactive. When a tracked property’s value changes, the component’s template automatically updates to reflect these changes. | This decorator is used to expose public properties and methods of a component. These properties and methods can be accessed by other components. |
| Scope | It is used within a component only for internal state management of a property | It is used for interaction and data exchange between components (Parent-Child) |
| Usage | Use this decorator when you need the component to re-render in response to changes in the property value but do not need to expose this property to other components. | User this decorator when you need to allow parent or sibling components to read or modify a property or call a method on the component. |
| Visibility | This decorator makes properties reactive within the component but does not expose them to other components. | This decorator exposes properties and methods to other components, making them part of the public API of the component. |
