HTML Checking for Large Sites
Rocket Validator automatically checks your pages on the W3C Validator.
HTML issues tagged as summary.
The <summary>
HTML element specifies a clickable summary, caption, or legend for a <details>
element’s disclosure box. As the <summary>
element has an implicit button
role, it’s not needed to include it explicitly.
Here’s an example, clicking the <summary> element toggles the state of the parent <details> element open and closed.
<details>
<summary>I have keys but no doors. I have space but no room. You can enter but can’t leave. What am I?</summary>
A keyboard.
</details>
Learn more:
Still checking your large sites one page at a time?
Save time using our automated web checker. Let our crawler check your web pages on the W3C Validator.