Today, write a mobile page, using a pop-up drop-down box, and the contents of the drop-down box can be scrollable. The problem is that when you scroll the drop-down box, the underlying body scrolls along with it. I looked up the method on the Internet, and one of them is to bind @ touchmove.prevent to the drop-down box to cancel the default behavior of the event. However, in actual use, debugging with chrome found that the console reported an error, indicating that you cannot cancel the default behavior that the passive value is the true event. Do you have any good solutions? Can vue only set its value to true, through the .passive event modifier but not change the passive default value from true to false?? Can you only set the passive value with native js binding events?