React Component Vs Purecomponent

koki cueng

Saturday, July 10, 2021

ReactComponent vs ReactPureComponent Reactjs The official React docs state that ReactPureComponent s shouldComponentUpdate only shallowly compares the objects and advises against this if state is deep. The major difference between ReactPureComponent and ReactComponent is PureComponent does a shallow comparison on state change.

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Advantage of using ReactPureComponent.

React component vs purecomponent. It is one of the most significant ways to optimize React applications. What is the difference between React Pure Component vs React Component. When props or state changes PureComponent will do a shallow comparison on both props and state.

Early on React developers had the idea of pure components. These components still used the ReactComponent class but the idea provided a useful mental model for developers to work with. By using the pure component there is no need for shouldComponentUpdate.

There is this main advantage of using ReactPureComponent over ReactComponent. On the other hand React pure component does implement shouldComponentUpdate by default and by performing a shallow comparison on React. This concept went by a variety of names statefulpure smartdumb containerpresentational etc but were all fairly similar.

Pure components calls shouldComponentUpdate and check shallow comparision logic to render a component or not that means PureComponent is used when there are much changes in state or props. A Component is one of the core building blocks of React. That allows the renderer to render the component while memoizing the output thus bailing out of updates if the components props are shallowly equal.

ReactPureComponent is similar to ReactComponent. So I conclude ReactPureComponent does shallow comparison over state only inside shouldComponentUpdate. Please correct me if I am wrong.

Pure component solves this issue. Reactmemo returns a special React component type. React Component vs PureComponent - YouTube.

PureComponent is an advanced optimisation technique. And that is as it shallowly compares props and state the. ReactJS provides two different ways to use components Component or PureComponent.

Normal React component does not call shouldComponentUpdate by default. This component is the parent of the Comp1 component. The base component does that for you out-of-the-box.

The difference between them is that ReactComponent doesnt implement shouldComponentUpdate but ReactPureComponent implements it with a shallow prop and state comparison. Our first component in the following example is App. Application routing through React Router and private route protection.

Import React PureComponent from react class App extends PureComponent render return div. Due to the limitations of a functional component you cannot implement life cycle hooks like shouldComponentUpdate to make explicit checks for renders. In the class components land you can define a component either by extending it from ReactComponent or from ReactPureComponent.

Using hooks where Ive found it interesting to use them replacing all classes with functions and taking advantage of the useEffect and useState hooks. But React has two types of Components. Reactmemo is a higher-order component.

Component and PureComponent have one difference. It is the type of component which re-renders itself every time when the props passed to it changes or its parent component re-renders. If your React components render function renders the same result given the same props and state you can use ReactPureComponent for a performance.

Optimisation because it has a potential to make your application faster. It takes a React component as its first argument and returns a special kind of React component. Meaning when you create a component by extending ReactPureComponent you need to implement it explicitly.

Advanced because it can also break your app if you are not careful. ReactComponent cho phép dev override lại shouldComponentUpdate hook mặc định hook này reference compare để quyết định re-render lại hay không. Use of styled components.

To use PureComponent simply derive your class-based component from ReactPureComponent instead of ReactComponent. ReactPureComponent is similar to ReactComponent But The difference between these two is ReactComponent doesnt handle shouldComponentUpdate. In other words we can say that every application you will develop in React will be made up of pieces called components.

We are creating Comp1 separately and just adding. Whatever component you use when it changes its state or it receives a new prop from its parent React will call the render lifecycle method of the component and of the all children of the component the famous VDOM kind of DOM in memory will. It means that when comparing scalar values it compares their values but when comparing objects it compares only references.

The biggest difference between React pure component vs a regular React component is that a React component doesnt implement shouldComponentUpdate by default. ReactPureComponent không cho phép dev override lại shouldComponentUpdate hook nếu bạn cố tình override thì bạn sẽ ăn ngay warning. Using components ie the old way.

And I have developed it in two different ways. ReactPureComponent is similar to ReactComponent. Pure components are written pretty much the same way as class components with a minor tweak.

PureComponent is exactly the same as Component except that it handles the shouldComponentUpdate method for you. The difference between them is that ReactComponent doesnt implement shouldComponentUpdate but ReactPureComponent implements it React Doc said.

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