link on click scroll into targeted div without body javascript

when i click a particular section’s link in link_div then i want to make scroll into the content_div’s section.

i try with javascript, but i cannot properly handle this. this scroll with whole body element.

my page is like this

<body>
    <div>header/navbar</div>
    <div>hero section</div>
    <div class="container position-relative">
        <div class="row d-flex">
            <div class="col-3 link_div position-sticky">
                <ul>
                    <li><span showSection(section1)>Section 1</span></li>
                    <li><span showSection(section2)>Section 2</span></li>
                    <li><span showSection(section3)>Section 3</span></li>
                    <li><span showSection(section4)>Section 4</span></li>
                    <li><span showSection(section5)>Section 5</span></li>
                </ul>
            </div>
            <div class="col-9 content_div">
                <div id="section1" class="height-300"></div>
                <div id="section2" class="height-300"></div>
                <div id="section3" class="height-300"></div>
                <div id="section4" class="height-300"></div>
                <div id="section5" class="height-300"></div>
            </div>
        </div>
    </div>
</body>

i use javascript’s method like – scrollTo, scrollBy, scrollIntoView but anyone cannot work properly


function showSection(sectionId) {
    var targetSection = document.getElementById(sectionId);
    var contentDiv = document.getElementById('content_div');

    if (targetSection && contentDiv) {
        var contentDivRect = contentDiv.getBoundingClientRect();
        var sectionRect = targetSection.getBoundingClientRect();
        var scrollPosition = sectionRect.top - contentDivRect.top + contentDiv.scrollTop;
        window.scrollTo(0, scrollPosition);

    }
}

i also try this-

function showSection(sectionId) {
    var selectedSection = document.getElementById(sectionId);
    if (selectedSection) {
        const scrollOffset = targetElement.offsetTop - scrollableDiv.offsetTop; 
        scrollableDiv.scrollTop = scrollOffset; 
        selectedSection.scrollIntoView({ behavior: 'smooth' });
    }
}