Asynchronous Programming

Platform: Win32

Battery level: 77%

Location: 41.0167, 28.9379

URL OK

Sample code

function init() {
    plat.innerText = navigator.platform
    navigator.geolocation.getCurrentPosition(p => 
      loc.innerText = p.coords.latitude.toFixed(4)
                +', '+p.coords.longitude.toFixed(4)
    )
    navigator.getBattery().then(b => 
      level.innerText = 100*b.level+'%'
    )
    check()
}
function check() {
    fetch(url.value).then(r => 
      resp.innerText = r.ok? 'OK' : 'Not found'
    ).catch(e => resp.innerText = e)
}