/Javascript/React/React native pure component vs component

React native pure component vs component

The major difference between React.PureComponent and React.Component is PureComponent does a shallow comparison on state change. It means that when comparing scalar values it compares their values, but when comparing objects it compares only references. It helps to improve the performance of the app.

You should go for React.PureComponent when you can satisfy any of the below conditions.

    State/Props should be an immutable object
    State/Props should not have a hierarchy
    You should call forceUpdate when data changes

If you are using React.PureComponent you should make sure all child components are also pure.

    is there any performance impact in using React.component that we may consider going for React.PureComponent?

Yes, it will increase your app performance (because of shallow comparison)

    I am guessing shouldComponentUpdate() of Purecomponent performs only shallow comparisons . If this is the case can' t the said method used for deeper comparisons?

You guessed it correctly. You could use it if you satisfy any of the conditions I mentioned above.

    "Furthermore, React.PureComponent's shouldComponentUpdate() skips prop updates for the whole component subtree" - Does this mean that prop changes are ignored?

Yes, prop changes will be ignored If it couldn't find difference in shallow comparison.

Source: stackoverflow.com

Similar codes

-2 votes145 views2 answers
Import link react
Javascript React
0 vote161 views1 answer
Library to add navigation in react native
Javascript React
-1 vote171 views2 answers
React native Platform
Javascript React
0 vote149 views1 answer
Scirpt tag react
Javascript React
0 vote174 views1 answer
React native webview postmessage example
Javascript React
5 votes105 views2 answers
React hook form
Javascript React
2 votes153 views1 answer
How to add multiple style attributes in react element
Javascript React
0 vote228 views1 answer
React router nested routes active
Javascript React
9 votes147 views5 answers
How to add array data on state react
Javascript React
113 votes252 views6 answers
How to create a new react app
Javascript React