What should I do if an operation depends on another first variable

F. Selçuk Can — Thu, 11 Jul 2019 14:04:40 +0000

What should I do if an operation depends on another first variable that is set by a setVariable (in the react hooks regard) in a useEffect.

This operation may set another second variable with the first variable.

I currently use another effect and check if the first variable is not undefined like

useEffect(() => {
    if (firstVariable) {
        let secondVariable = f(firstVariable)
    }
}, [firstVariable])

Is it a bad pattern?
Is there a better way doing this?

Note: f is a hypothetical function defined somewhere else. It is jsut to show I am just not renaming the firstVariable but making arbitrary operations on it. What is the operations are out of purpose of this topic.

DEV Community: F. Selçuk Can

What should I do if an operation depends on another first variable