/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 vote293 views1 answer
React image onerror
Javascript React
-2 votes259 views2 answers
React gsap
Javascript React
-1 vote256 views1 answer
Vimeo player react native
Javascript React
1 vote283 views2 answers
Change text size according to screen react native
Javascript React
1 vote275 views1 answer
Input type number react native
Javascript React
1 vote302 views1 answer
React demo
Javascript React
0 vote287 views1 answer
How to create module in react
Javascript React
6 votes285 views1 answer
Remove yellow warning react native emulator
Javascript React
0 vote288 views1 answer
React native webview postmessage example
Javascript React
5 votes297 views3 answers
Open in a new tab react
Javascript React