问题
The specific warning message is:
Unable to preventDefault inside passive event listener due to target being treated as passive.
This issue can also be reproduced easily in the demo site by JTSage if you use chrome F12 "Device" mode -- many warning in F12 console.
http://dev.jtsage.com/DateBox/jqm/timeflipbox/
http://dev.jtsage.com/DateBox/
Is it something to be concerned about? Occasionally my Chrome simulator would freeze. But I do not know for sure if this is related to those warnings.
I have also googled a bit to find below link, but I do not know enough on how to apply their suggestions on jtsage timeflipbox yet:
https://github.com/bevacqua/dragula/issues/468
Any suggestions?
回答1:
Use this CSS:
.ui-datebox-container {
touch-action: none;
}
Reference: https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action
来源：https://stackoverflow.com/questions/50593504/saw-hundreds-of-warning-on-latest-chrome-f12-device-mode-when-scrolling-jtsage-t