/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 vote383 views1 answer
Route guards in react
Javascript React
0 vote373 views1 answer
React js how to do array range
Javascript React
94 votes388 views6 answers
Install react router
Javascript React
32 votes359 views1 answer
React router command
Javascript React
3 votes356 views2 answers
React router active link css
Javascript React
0 vote353 views1 answer
React js error stackoverflaw
Javascript React
18 votes366 views1 answer
Get specific characters from state variable reactjs
Javascript React
1 vote367 views1 answer
Change react native app name
Javascript React
0 vote367 views1 answer
Switch button react value
Javascript React
0 vote355 views1 answer
ERROR TypeError: undefined is not an object (evaluating '_reactNative.Styles.m aincont')
Javascript React