<script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>

<h4>html()</h4>
        <div class="html">안녕하세용가리</div>
        <button type="button" onclick="changeHtmlJs()">js로 바꾸기</button>
        <button type="button" onclick="changeHtmlJquery()">jquery로 바꾸기</button>
//html

function changeHtmlJs() {
    let p = document.querySelector('.html');
    p.innerHTML = '<p>javaScript</p>';
}
function changeHtmlJquery() {
    $('.html').html('<p>jquery</p>');
}

External CSS

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External JavaScript

This Pen doesn't use any external JavaScript resources.