In LWC, there are various ways to communicate across the DOM. Events are one of the most popular techniques. Events in LWC, which can be either standard or custom, are used to communicate between components. Custom events, which enable data sharing and component interaction, can be launched by one component and captured by another. Standard events, which include button clicks and page loads, are built-in events that are started by user or system activities.
In LWC, properties are another means of inter-DOM communication. Variables that can be passed from one component to another are called properties. A property that is used by more than one component may be automatically updated when it is changed in one component.
The Lightning Message Service, a fresh messaging system that offers a standard mechanism for components to communicate across the DOM, is also supported by LWC. Components can communicate with one another in a loosely connected fashion thanks to the Lightning Message Service, which eliminates the need for prior knowledge of one another.
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Understanding the component hierarchy is crucial for LWC communication across the DOM. LWC's component hierarchy is made up of parent components that contain child components. A component is added to the DOM and added to the component hierarchy when it is generated. Because child components have access to the properties and methods of their parent components, this hierarchy can be utilised to facilitate communication between components.
A crucial component of LWC that enables seamless integration and data sharing across components is communication across the DOM. Developers may build effective and sophisticated online apps that are simple to maintain and update by utilising events, properties, and the Lightning Message Service. Developers should be careful to design their components with communication in mind since understanding the component hierarchy is essential for efficient communication between components.
Check out another amazing blog by Kapil here: Handle Events in LWC | All You Need to Know