/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

11 votes397 views3 answers
React app and tailwind
Javascript React
0 vote365 views3 answers
React hook example
Javascript React
1 vote389 views1 answer
React connect production
Javascript React
0 vote404 views1 answer
React native getting old navigation parameter
Javascript React
3 votes397 views2 answers
React get route path
Javascript React
0 vote396 views1 answer
React bootstrap make col disapear in small screens
Javascript React
0 vote407 views1 answer
How to add a useState in react Js
Javascript React
10 votes440 views2 answers
Generate random string react
Javascript React
66 votes343 views6 answers
Routing react
Javascript React
0 vote404 views1 answer
React native navigation shared element
Javascript React