via the Network Information API. https://developer.mozilla.org/en-US/docs/Web/API/Network_Information_API https://developer.mozilla.org/en-US/docs/Web/API/Netw

via the Network Information API. https://developer.mozilla.org/en-US/docs/Web/API/Network_Information_API https://developer.mozilla.org/en-US/docs/Web/API/Network_Inf... Connections start metered and are then upgraded when an unmetered connection is successfully detected.