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url: /api/tools/demo/src/variables/FULLSCREEN_BUTTON_HTML.md
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[pantoken-root](../../../../index.md) / [tools/demo/src](../index.md) / FULLSCREEN_BUTTON_HTML

# Variable: FULLSCREEN_BUTTON_HTML

> `const` **FULLSCREEN_BUTTON_HTML**: `string`

A hoverable "view fullscreen" button, overlaid on a demo/example frame the same way VitePress's own
code-block "copy" button reveals on hover. Purely markup — wire a delegated click handler in your
host page (`button.closest(...).querySelector("iframe")?.requestFullscreen()`; see the pantoken docs
theme for the reference wiring) and style the reveal-on-hover with `@pantoken/demo/demo.css`.