To create an accordion feature where only one section can be opened at a time, you can approach the JavaScript logic by adding event listeners to each accordion header. When a header is clicked, you would first check which section is currently open and close it if it’s different from the one that was clicked. This can be achieved using a simple toggle mechanism where each section has its own header and content. You can use `classList.toggle()` to manage the visibility of the sections while ensuring to remove the ‘active’ class from any previously opened sections. This provides a clear and fluid transition between sections, resulting in a smooth user experience.

Here’s a straightforward implementation: each accordion item should have a common class (e.g., `.accordion-item`). The JavaScript function can loop through all items, close the ones that are open, and then open the clicked section. Here’s a simplified code snippet:

document.querySelectorAll('.accordion-header').forEach(header => {
    header.addEventListener('click', () => {
        const currentlyActiveHeader = document.querySelector('.accordion-header.active');
        if (currentlyActiveHeader && currentlyActiveHeader !== header) {
            currentlyActiveHeader.classList.remove('active');
            currentlyActiveHeader.nextElementSibling.style.display = 'none';
        }
        header.classList.toggle('active');
        const content = header.nextElementSibling;
        content.style.display = header.classList.contains('active') ? 'block' : 'none';
    });
});

In this example, when a header is clicked, it checks if there’s another active header and closes it before opening the clicked one. Ensure to set the CSS for `.accordion-header` and content sections to manage visibility! By following this method, you can effectively implement a single-expansion accordion and enhance the usability of your web application.