Created
September 2, 2020 16:52
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Detect system sleep and wake events in browser.
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<html> | |
<head> | |
<title>sleep.js</title> | |
</head> | |
<body> | |
<h1>sleep.js</h1> | |
<script src="sleep.js"></script> | |
<script> | |
function logEvent(event) { | |
const time = new Date(event.detail).toTimeString().substr(0, 8); | |
console.log(event.type, time); | |
}; | |
document.addEventListener('sleep', logEvent); | |
document.addEventListener('wake', logEvent); | |
</script> | |
</body> | |
</html> |
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(() => { | |
const data = | |
'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'; | |
const video = document.createElement('video'); | |
video.loop = true; | |
video.muted = true; | |
video.src = `data:video/mp4;base64,${data}`; | |
video.play().then( | |
() => { | |
Object.entries({ | |
pause: 'sleep', | |
play: 'wake', | |
}).forEach(([type, customType]) => { | |
video.addEventListener(type, () => { | |
document.dispatchEvent( | |
new CustomEvent(customType, { detail: Date.now() }), | |
); | |
}); | |
}); | |
console.info('System sleep/wake detection video initialized.'); | |
}, | |
() => { | |
console.error('Unable to initialize system sleep/wake detection.'); | |
}, | |
); | |
})(); |
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More homework: https://developer.mozilla.org/en-US/docs/Web/API/Page_Visibility_API