In Lightning Web Components (LWC), the lifecycle hook that is called after the component is connected to the DOM (Document Object Model) is the connectedCallback.

connectedCallback:

The connectedCallback lifecycle hook is invoked when the component is inserted into the DOM.

It is useful for performing actions that should occur once the component is connected to the document, such as fetching data from a server, initializing variables, or setting up event listeners.

This hook is called after the component's template has been inserted into the DOM.

Example:


In the above example, when an instance of ExampleComponent is created and inserted into the DOM, the connectedCallback is called, and the message "Component connected to the DOM" will be logged to the console.

This hook is part of the lifecycle methods provided by LWC and is beneficial for performing setup tasks that need to happen when the component becomes part of the rendered document.