Graham Quince Posted April 24, 2023 Posted April 24, 2023 Here's a cute bit of code that shows that Javascript can read your laptop or Android's battery: <style> .battery_level { font-size: 30px; font-weight: bold; border: 1px solid #cccccc; border-radius: 6px; padding: 20px; } </style> <div class="battery_level"></div> <script> var batteryDiv = arguments[0].find('.battery_level'); let isBatterySupported = 'getBattery' in navigator; if(!isBatterySupported) { batteryDiv.html('Battery not supported'); } else { let batteryPromise = navigator.getBattery(); batteryPromise.then(batteryCallback); function batteryCallback(batteryObject) { var percent = batteryObject.level*100; batteryDiv.html('Your battery is at: '+percent+' %'); } } </script> Probably not of tremendous use, I suppose you could use to remind students to plug in.
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