<details> and <summary> Tags — HTML Technical Interview Questions & Answers

A native, JS-free collapsible disclosure widget.

<details> and <summary> Tags

  • A native, JS-free collapsible disclosure widget.
  • <details> is the <details> HTML element. HTML uses this tag so the browser (and screen readers) know what the piece is, not only how it looks.
  • Board: <details>…</details> Put it in body. Check it in the browser. Attributes go on the opening tag.
  • Trap: wrong nesting or missing a required attribute. CSS can still style it — don’t pick a tag only because of default italics.
  • Interview: name the tag, one attribute if it has a famous one (href, src, alt, for, type), one mistake.

Technical Interview Tip: <details>: the <details> HTML element. Example: <details>…</details>

Code Examples for <details> and <summary> Tags

<details> and <summary> Tags — working example

<details>
  <summary>Show answer</summary>
  <p>Semantic HTML improves accessibility and SEO.</p>
</details>

<details> and <summary> Tags — details/summary give a native disclosure widget without JavaScript.

How to Explain <details> and <summary> Tags to an Interviewer

What is the <details> tag?

the <details> HTML element <details>…</details>

One common mistake?

wrong nesting or missing a required attribute