A component 'mounts' when ...

A component 'mounts' when ...

• A. A Component Renders For The First Time
• B. A Component Updates
• C. A Component Unmounts
• D. A Component Is Created But Not Rendered

Answer: (A)

Mounting is the initial insertion of a component into the DOM, which happens when it renders for the first time. So the component mounts on its first render when it becomes part of the UI, and then you’ll typically see lifecycle events like componentDidMount afterward. After mounting, further changes to state or props cause re-renders that are described as updates, not mounts. If a component is created but never rendered, it never gets into the DOM, so it isn’t mounting.

Mounting is the initial insertion of a component into the DOM, which happens when it renders for the first time. So the component mounts on its first render when it becomes part of the UI, and then you’ll typically see lifecycle events like componentDidMount afterward. After mounting, further changes to state or props cause re-renders that are described as updates, not mounts. If a component is created but never rendered, it never gets into the DOM, so it isn’t mounting.