cancel loop scroll still cause the index change

[you06]

Suppose we have this requirement:

• This is a loop scroll application.
• It can only loop from the end to the start

Then I'm going to cancel the scroll event when it scroll from the start to the end. This is my beforeChange callback function.

beforeChange: function (el, prev, next) {
  console.log('brefore', prev, next)
  if (prev === 2 && next === 2) {
    return false
  }
  console.log('after', prev, next)
}

See JSFiddle demo: https://jsfiddle.net/z4Lvwhr6/

Once open, scroll up for twice, there will be there logs in the console:

brefore 2 2 // no scroll happened, still in page1
brefore 2 1 // scroll from page1 to page2
after 2 1