Too many re-renders while setting a state-CodePudding

Getting an error of Unhandled Runtime Error while setting a state in an axios get call. Even tested with a button click and confirmed that function is not called more that once. I don't know what is the problem with it.

Error: Too many re-renders. React limits the number of renders to prevent an infinite loop.

const [quizzesTaken, setQuizzesTaken] = useState([])

const quizzesTakenByUser = async () => {
    try {
        const res = await axios.get('/api/quizzes/quizzestaken')
        setQuizzesTaken(res.data) // Getting error on this line.
    } catch (error) {
        log(error)
    }
}

<button onClick={() => quizzesTakenByUser()}>Get Quizzes</button>

useEffect(() => {
    if (gradeText !== 'none') {
        getGradeDescription()
    }
}, [gradeText])

This is how I render the components base on quizzesTaken

{quizzesTaken.map(q => {
    return (
        <QuizTakenItem
            subject={
                q.subject  
                ' '  
                q.class_name
            }
            correct={q.correct_ans}
            total={q.total_questions}
        />
    )
})}

CodePudding user response：

The problem is solved after I removed the code setting the independent state of the child component but now it is a more annoying problem to the brain, why it was like that is still a question?

const [width, setWidth] = useState("10%")
const {correct, total} = props;

setWidth(((correct/total) * 100)   "%")

And thank you all for your help.

CodePudding user response：

Did you try this way, using then() :

const [quizzesTaken, setQuizzesTaken] = useState([])

const quizzesTakenByUser = () => {
    axios.get('/api/quizzes/quizzestaken')
        .then(res => setQuizzesTaken(res.data)
        .catch(error => console.log(error)
}

<button onClick={() => quizzesTakenByUser()}>Get Quizzes</button>

CodePudding user response：

Did you tried like this?

<button onClick={quizzesTakenByUser}>Get Quizzes</button>