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

Install

npm install devtools-detect

Usage

<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.