/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 votes143 views1 answer
React dynamic import
Javascript React
0 vote142 views1 answer
Clear form inside modal after close reactjs
Javascript React
19 votes138 views2 answers
Devtools failed to load sourcemap when debugging react native
Javascript React
0 vote129 views1 answer
How to find network there is no network react native
Javascript React
108 votes208 views2 answers
React start new app
Javascript React
1 vote131 views1 answer
Add value to state array react native dispatch
Javascript React
0 vote150 views1 answer
How to get parent's ref react
Javascript React
0 vote136 views2 answers
Animation react
Javascript React
0 vote134 views1 answer
React native charts style gradiant
Javascript React
0 vote154 views1 answer
Can i open native video playback for both (Androidt / IOS) With React Native?
Javascript React