How can I get the devices battery level in javascript

2018-07-04 14:53:42

I am doing a network call every 15 seconds in my app, and if the users device battery percent is lower than 20%, than I would like to do the call every 30 seconds instead. How do I get the user's devices current battery level? Is it possible? Any help would be appreciated.

Take a look at the Battery Status API. It doesn't work in all browsers, but it's a start.

For browsers that support it, something like this should work:

navigator.getBattery().then(function(battery) {
  battery.addEventListener('levelchange', function() {    
    // Do stuff when the level changes, you can get it
    // from battery.level
    document.write((battery.level*100)+"%");
  })
  document.write((battery.level*100)+"%");
});

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