An expand/collapse widget, often called an accordion or a disclosure widget, allows users to toggle the visibility of content. This pattern preserves screen space by hiding information until the user requests it.
Semantic HTML introduces meaning to the web page rather than just presentation. For example, a <p> tag indicates that the enclosed text is a paragraph. This is crucial for accessibility, allowing screen readers to interpret the page structure correctly.
Using aria-expanded and aria-controls attributes helps assistive technology users understand the relationship between the button and the content.
No! You can implement this functionality using vanilla JavaScript, standard CSS, and HTML5.
max-height.