Vinicius Gularte
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Unveiling the Power of <details> and <summary> in HTML


Unveiling the Power of details and summary in HTML

In the vast world of HTML, there are several tags that often go unnoticed but pack a punch in terms of functionality. Among these, the <details> and <summary> tags stand out as hidden gems. These tags provide a native way to create toggleable content, making it easier for developers to craft interactive UI elements without relying on JavaScript.

What are details and summary?

The <details> tag creates a widget where content is disclosed or hidden until the user triggers its "open" state. Inside the <details> tag, you can use the <summary> tag to define the content that's always visible and acts as the toggle control.


  1. Native Functionality: No need for external libraries or JavaScript to create a toggle effect.
  2. Accessibility: These tags are designed with accessibility in mind, ensuring that the toggleable content is accessible to screen readers and other assistive technologies.
  3. Styling Flexibility: While the default styling is browser-dependent, it's easy to customize using CSS.

Practical Examples:

Simple Dropdown:

<summary>Click to see more</summary>
<p>This is the hidden content that will be displayed when the summary is clicked.</p>

FAQ Section:

<summary>What is the meaning of life?</summary>
<p>42, according to Douglas Adams' "The Hitchhiker's Guide to the Galaxy".</p>
<summary>How does the <details> tag work?</summary>
<p>It creates a toggleable content section, which can be controlled by the <summary> tag inside it.</p>

Styling and Customization:

While the default look of the <details> and <summary> tags is quite basic, you can easily style them with CSS to match your website's design. For instance, you can change the default arrow to a custom icon, adjust the background color, or add borders and shadows.


The <details> and <summary> tags are powerful tools in a developer's arsenal, offering a native solution for toggleable content. By leveraging these tags, developers can create interactive and accessible UI elements with ease, enhancing user experience without the overhead of additional scripts or libraries. So, the next time you're looking to add a dropdown or collapsible section to your website, consider giving these tags a try!