Q41. What are the problems of using render props with pure components?
If you create a function inside a render method, it negates the purpose of pure component. Because the shallow prop comparison will always return false for new props, and...
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Q42. Describe about data flow in react?
React implements one-way reactive data flow using props which reduce boilerplate and is easier to understand than traditional two-way data binding.
Q43. What is the main difference between method and computed property?
The main difference between a computed property and a method is that computed properties are cached and invoke/change only when their dependencies change. Whereas a metho...
Q44. Should I learn ES6 before learning ReactJS?
No, you don’t have to learn es2015/es6 to learn react. But you may find many resources or React ecosystem uses ES6 extensively. Let's see some of the frequently used ES6 ...
Q45. Can I use computed property in another computed property?
Yes, you can access it directly as you would data props. For example, the comboTwo computed property uses comboOne computed property as below, ```javascript data() { retu...
Q46. Is recommended to use async for computed properties?
No, it is not recommended. Computed properties should be synchronous. But if you still use asynchronous actions inside them, they may not work as expected and can lead to...
Q47. How do you prevent mutating array variables?
The preexisting variables outside of the function scope including state, props and context leads to a mutation and they result in unpredictable bugs during the rendering ...
Q48. What is useContext? What are the steps to follow for useContext?
The `useContext` hook is a built-in React Hook that lets you access the value of a context inside a functional component without needing to wrap it in a component. It hel...
Q49. What are the use cases of useContext hook?
The `useContext` hook in React is used to share data across components without having to pass props manually through each level. Here are some common and effective use ca...
Q50. Can useRef be used to store previous values?
Yes, `useRef` is a common pattern when you want to compare current and previous props or state without causing re-renders. **Example: Storing previous state value** ```js...