There is also a battery status API for web apps https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API https://developer.mozilla.org/en-US/docs/We

There is also a battery status API for web apps https://developer.mozilla.org/en-US/docs/Web/API/Battery_Status_API https://developer.mozilla.org/en-US/docs/Web/API/Battery_Sta... Web audio api https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_API https://developer.mozilla.org/en-US/docs/Web/API/Web_Audio_A...