HTML <iframe> allowfullscreen Attribute
Example
<iframe src="https://www.youtube.com/embed/KrM107U_uRg" allowfullscreen>
Your browser does not support iframe element.
</iframe>
Meaning
The allowfullscreen attribute set to true if the <iframe> can activate fullscreen mode by calling the requestFullscreen() method.
Note: This attribute is considered a legacy attribute and redefined as allow="fullscreen".
Standard Syntax
<iframe allowfullscreen="allowfullscreen">
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Attribute Values
| Value | Description |
|---|---|
| allowfullscreen | This is a boolean attribute, the presence of a boolean attribute on an element represents the true value, and the absence of the attribute represents the false value. |