please help.
i still confuse why i got delay when update the button color when i click the colors.
if i see the console.log when i click the button, it has no delay, but when it update to colors, it got delayed.
let me show you the code,
here is the code for button :

{kuis.question[index].answer.map((a, i) => (
                            <button
                                onClick={() => selectAnswer(a)}
                                className={
                                    "flex items-center px-6 py-3 mb-1 border-[1px] rounded-lg gap-5 " +
                                    (a.id ==
                                        quiz.question[index].user_answer
                                            .quiz_question_answer_id &&
                                        "bg-green-400")
                                }
                            >
                                <span className="w-[30px] h-[30px] rounded-md bg-black text-white text-sm text-center items-center flex justify-center">
                                    {i == 0
                                        ? "A"
                                        : i == 1
                                        ? "B"
                                        : i == 2
                                        ? "C"
                                        : i == 3
                                        ? "D"
                                        : "E"}
                                </span>
                                {a.description}
                            </button>
                        ))}

so, i create a looping for create the answer choice, it will looping for create 5 options button.
and for the selectAnswer function, i use this :

function selectAnswer(e) {
    let k = kuis;
    k.question[index].user_answer.quiz_question_answer_id = e.id;
    console.log(e.id);
    setKuis(k);
    axios.post("/api/select_answer", {
        id: k.question[index].user_answer.id,
        quiz_question_answer_id: e.id,
    });
}

but it has delay for the button to change the colors to green when it get selected.

please help, i need your help.