/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 vote259 views1 answer
Add update react pwa feature
Javascript React
1 vote225 views1 answer
Scale text in div react
Javascript React
3 votes211 views2 answers
React usestate functional update
Javascript React
19 votes232 views3 answers
React Hooks append state
Javascript React
6 votes242 views1 answer
React native rotate
Javascript React
0 vote223 views1 answer
Basic react code
Javascript React
0 vote233 views1 answer
How to use rgba in react native
Javascript React
26 votes178 views4 answers
React context
Javascript React
-1 vote224 views1 answer
React native list view
Javascript React
0 vote226 views1 answer
React image source showing object module
Javascript React