<strong class="text">
안녕하세요
</strong>
const text = document.querySelector('.text');
text.insertAdjacentHTML('beforebegin', '<span>오늘의 날씨는</span>');
text.insertAdjacentHTML('afterbegin', '<span>맑습니다</span>');
text.insertAdjacentHTML('beforeend', '<span>현재 기온은</span>');
text.insertAdjacentHTML('afterend', '<span>20도입니다</span>');
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