/Javascript/React/React should write method in a functional component or outside functional component

React should write method in a functional component or outside functional component

In most cases you should declare the functions outside of the component function
so you declare them only once and always reuse the same reference. When you 
declare the function inside, every time the component is rendered the function 
will be defined again.

There are cases in which you will need to define a function inside the component
to, for example, assign it as an event handler that behaves differently based on
the properties of the component. But still you could define the function outside
Ball and bind it with the properties, making the code much cleaner and making 
the update or draw functions reusable.

Source: stackoverflow.com

Similar codes

10 votes349 views5 answers
Form react js
Javascript React
20 votes328 views6 answers
Useeffect react example
Javascript React
1 vote318 views3 answers
Window.innerHeight react js
Javascript React
15 votes316 views2 answers
Link reload page react
Javascript React
0 vote326 views1 answer
React form input not working
Javascript React
0 vote389 views1 answer
React scroll to top on page refresh - don't restore position
Javascript React
0 vote329 views7 answers
Convert css box shadow to react native
Javascript React
0 vote325 views1 answer
Take string until react
Javascript React
1 vote317 views1 answer
React js console log not working
Javascript React
6 votes280 views2 answers
React native socket io
Javascript React