/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

0 vote264 views2 answers
React native maximum update depth exceeded
Javascript React
0 vote211 views1 answer
Upload file react onclick
Javascript React
0 vote201 views1 answer
React native Stack Navigation Prop unused variable
Javascript React
-1 vote213 views1 answer
React native toggle button with text
Javascript React
0 vote202 views1 answer
React native better camera
Javascript React
0 vote211 views1 answer
Change navigation animation react native
Javascript React
0 vote278 views2 answers
How to make a search bar in react django
Javascript React
0 vote218 views1 answer
Can you wrap redux provider within react.strictmode
Javascript React
0 vote272 views1 answer
React-native firebase v9+ config
Javascript React
0 vote202 views1 answer
Search for country name from api with react
Javascript React