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Questions and Answers
What is the main purpose of the virtual DOM?
What is the main purpose of the virtual DOM?
- To manipulate attributes and handle events in the real DOM
- To enable incremental rendering of the virtual DOM
- To implement scoping variables and CSS in web components
- To keep an ideal representation of the UI in memory and sync it with the real DOM (correct)
What is the main difference between the Shadow DOM and the virtual DOM?
What is the main difference between the Shadow DOM and the virtual DOM?
- The Shadow DOM is used for manipulating attributes and handling events in the real DOM, while the virtual DOM enables incremental rendering
- The Shadow DOM is a concept implemented by libraries in JavaScript, while the virtual DOM is a browser technology
- The Shadow DOM is a pattern, while the virtual DOM is an internal object in React
- The Shadow DOM is designed for scoping variables and CSS, while the virtual DOM is implemented by libraries in JavaScript (correct)
What is the purpose of 'React Fiber'?
What is the purpose of 'React Fiber'?
- To enable incremental rendering of the virtual DOM (correct)
- To implement scoping variables and CSS in web components
- To manipulate attributes and handle events in the real DOM
- To hold additional information about the component tree
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Study Notes
Virtual DOM
- The main purpose of the Virtual DOM is to optimize the rendering of components by minimizing the number of DOM mutations, which can be costly in terms of performance.
- It serves as a lightweight in-memory representation of the real DOM, allowing for efficient and fast updates.
Shadow DOM and Virtual DOM
- The main difference between the Shadow DOM and the Virtual DOM is that the Shadow DOM is a browser feature that allows developers to separate presentation and content layers, whereas the Virtual DOM is a library-specific concept used in libraries like React.
- The Shadow DOM is used to encapsulate a component's DOM, hiding it from the rest of the page, whereas the Virtual DOM is used to optimize rendering.
React Fiber
- The purpose of React Fiber is to improve the performance and responsiveness of React applications by introducing a new architecture that allows for incremental rendering, scheduling, and reconciliation of components.
- It enables features like concurrency, suspense, and error boundaries, which improve the overall user experience.
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