Q11. Is Hooks cover all use cases for classes?
Hooks doesn't cover all use cases of classes but there is a plan to add them soon. Currently there are no Hook equivalents to the uncommon **getSnapshotBeforeUpdate** and...
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Q12. What are the lifecycle hooks in the Vue 3 Composition API and how are they used?
In **Composition API**, lifecycle hooks are functions you call **inside the `setup()` function** to hook into different stages of a component's lifecycle. These hooks rep...
Q13. Is it possible to access a ref in the render method?
Yes, you can access a ref in the render method, but what you get from it depends on how you're using the ref and when in the component lifecycle you're rendering. For exa...
Q14. What are the different phases of component lifecycle?
The component lifecycle has three distinct lifecycle phases: 1. **Mounting:** The component is ready to mount in the browser DOM. This phase covers initialization from `c...
Q15. What are the lifecycle methods of React?
Before React 16.3 - **componentWillMount:** Executed before rendering and is used for App level configuration in your root component. - **componentDidMount:** Executed af...
Q16. Is it good to use `setState()` in `componentWillMount()` method?
**⚠️ DEPRECATED:** `componentWillMount()` has been removed in React 17+. This question is only relevant for legacy React applications. **Historical Context:** While it wa...
Q17. What is the lifecycle methods order in mounting?
The lifecycle methods are called in the following order when an instance of a component is being created and inserted into the DOM. 1. `constructor()` 2. `static getDeriv...
Q18. What are the lifecycle methods going to be deprecated in React v16?
**⚠️ FULLY DEPRECATED:** These lifecycle methods have been deprecated and removed from React 17+. The following lifecycle methods were deprecated due to unsafe coding pra...
Q19. What is the purpose of `getDerivedStateFromProps()` lifecycle method?
The new static `getDerivedStateFromProps()` lifecycle method is invoked after a component is instantiated as well as before it is re-rendered. It can return an object to ...
Q20. What is the purpose of `getSnapshotBeforeUpdate()` lifecycle method?
The new `getSnapshotBeforeUpdate()` lifecycle method is called right before DOM updates. The return value from this method will be passed as the third parameter to `compo...