After some research, I have found that the easiest and more reliable way to tell if the current browser is on a mobile device is with this:
Source code
function isMobile () {
return /Mobi/.test(window.navigator.userAgent)
}
Just as the MDN says on the topic:
In summary, we recommend looking for the string "Mobi" anywhere in the User Agent to detect a mobile device.
Easy peasy, lemon squeezy! 🍋