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Krishna Singh 22Krishna Singh 22 

Spring '19 preview issue? Touch events not recognized

Hi,
I have an app which uses javascript touch event attributes like 'changedTouches'. This was working before spring '19 preview release and stopped working after sandbox preview was released. On invesigation i came across the below:User-added image
As can be seen there is an exception for these attributes of the event 'touchStart' event.
Can anyone suggest what needs to be done? Is this release defect/issue? 
Raj VakatiRaj Vakati
Please post this in idea exchgange .. 

https://success.salesforce.com/issues_view