How to reset button style in Javascript

function showQuestion(questionAndAnswers) {
    const shuffledAnswers = _.shuffle(questionAndAnswers.answers);
    questionTag.innerText = questionAndAnswers.question;
    shuffledAnswers.forEach(({ text, correct }, i) => {
        answerTag[i].innerText = text;
        answerTag[i].dataset.correct = correct;
    });
}
document.querySelectorAll(".answer").forEach((answer) => {
    answer.addEventListener("click", (event) => {
        if (event.target.dataset ) {
            answer.style.border = "1.5px solid"
        } 
    });
});
function nextQuestion() {
    const nextIndex = currentQuestionIndex + 1;
    if (nextIndex <= myQuestions.length - 1) {
        showQuestion(myQuestions[nextIndex]);
        currentQuestionIndex = nextIndex;
    } else {
        end.style.visibility = "visible";
        nxt_question_btn.style.visibility = "hidden";
    }
}