Q71. What are HOC factory implementations?
There are two main ways of implementing HOCs in React. 1. Props Proxy (PP) and 2. Inheritance Inversion (II). But they follow different approaches for manipulating the _W...
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Q72. What is the main purpose of constructor?
The constructor is mainly used for two purposes, 1. To initialize local state by assigning object to this.state 2. For binding event handler methods to the instance For e...
Q73. What is the methods order when component re-rendered?
An update can be caused by changes to props or state. The below methods are called in the following order when a component is being re-rendered. 1. static getDerivedState...
Q74. How do you say that state updates are merged?
When you call setState() in the component, React merges the object you provide into the current state. For example, let us take a facebook user with posts and comments de...
Q75. How to prevent component from rendering?
You can prevent component from rendering by returning null based on specific condition. This way it can conditionally render component. ```javascript function Greeting(pr...
Q76. Is ref argument available for all functions or class components?
Regular function or class components don’t receive the ref argument, and ref is not available in props either. The second ref argument only exists when you define a compo...
Q77. How to create react class components without ES6?
If you don’t use ES6 then you may need to use the create-react-class module instead. For default props, you need to define getDefaultProps() as a function on the passed o...
Q78. Is it possible to use react without JSX?
Yes, JSX is not mandatory for using React. Actually it is convenient when you don’t want to set up compilation in your build environment. Each JSX element is just syntact...
Q79. How do you create HOC using render props?
You can implement most higher-order components (HOC) using a regular component with a render prop. For example, if you would prefer to have a withMouse HOC instead of a c...