Use {passive: true} for the scroll event listener

[tchapi]

Hi,

Would it be possible to add an option (or maybe, always set it) so we could ad {passive: true} to the event listener ?
This would improve performance in many cases (and improve audits with tools like Lighthouse for instance)

I'm talking about this line :

vue-affix/src/affix.vue

Line 479 in dba91fc

this.scrollContainer.addEventListener('scroll', this.handleScroll);

Thanks !

[tchapi]