Answer
The `sandbox` attribute places safety limits on content inside an iframe. β’ It is written inside an elementβs opening tag. β’ The HTML Standard limits which elements may use it and which values are valid. β’ Browsers apply the attribute when they process the element or the resource it controls.
💡 Simple Example
<iframe src="demo.html" sandbox></iframe>
⚡ Quick Revision
Sandbox restricts what embedded iframe content may do.