Q31. What are default props?
The _defaultProps_ can be defined as a property on the component to set the default values for the props. These default props are used when props not supplied(i.e., undef...
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Q32. What are Keyed Fragments?
The Fragments declared with the explicit syntax may have keys. The general use case is mapping a collection to an array of fragments as below, ```javascript function Glos...
Q33. Does React support all HTML attributes?
As of React 16, both standard or custom DOM attributes are fully supported. Since React components often take both custom and DOM-related props, React uses the camelCase ...
Q34. When component props defaults to true?
If you pass no value for a prop, it defaults to true. This behavior is available so that it matches the behavior of HTML. For example, below expressions are equivalent, `...
Q35. How do you pass an event handler to a component?
You can pass event handlers and other functions as props to child components. The functions can be passed to child component as below, ```jsx function Button({ onClick })...
Q36. How do you say that props are readonly?
When you declare a component as a function or a class, it must never modify its own props. Let us take a below capital function, ```javascript function capital(amount, in...
Q37. Should keys be globally unique?
The keys used within arrays should be unique among their siblings but they don’t need to be globally unique. i.e, You can use the same keys with two different arrays. For...
Q38. How to use model directive with two way computed property?
You can still use model directive using two-way computed property with a setter. ```javascript computed: { username: { get () { return this.$store.state.user.username }, ...
Q39. Why are you not required to use inheritance?
In React, it is recommended to use composition over inheritance to reuse code between components. Both Props and composition give you all the flexibility you need to cust...
Q40. Must prop be named as render for render props?
Even though the pattern named render props, you don’t have to use a prop named render to use this pattern. i.e, Any prop that is a function that a component uses to know ...