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# devtools-detect
> Detect if DevTools is open and its orientation
Useful for when you want something special to happen when DevTools is open. Like pausing canvas, adding style debug info, etc.
## [Demo](https://sindresorhus.com/devtools-detect)
## Install
```sh
npm install devtools-detect
```
## Usage
```html
<script type="module">
import devtools from './node_modules/devtools-detect/index.js';
// Check if it's open
console.log('Is DevTools open:', devtools.isOpen);
// Check it's orientation, `undefined` if not open
console.log('DevTools orientation:', devtools.orientation);
// Get notified when it's opened/closed or orientation changes
window.addEventListener('devtoolschange', event => {
console.log('Is DevTools open:', event.detail.isOpen);
console.log('DevTools orientation:', event.detail.orientation);
});
</script>
```
## Support
- Chrome DevTools
- Safari DevTools
- Firefox DevTools
- Opera DevTools
## Caveats
Doesn't work if DevTools is undocked and will show false positive if you toggle any kind of sidebar.