function getCurrentPage() {
|
const pages = getCurrentPages();
|
return pages[pages.length - 1] || {};
|
}
|
function onPageScroll(event) {
|
const { vanPageScroller = [] } = getCurrentPage();
|
vanPageScroller.forEach((scroller) => {
|
if (typeof scroller === 'function') {
|
scroller(event);
|
}
|
});
|
}
|
export const pageScrollMixin = (scroller) =>
|
Behavior({
|
attached() {
|
const page = getCurrentPage();
|
if (Array.isArray(page.vanPageScroller)) {
|
page.vanPageScroller.push(scroller.bind(this));
|
} else {
|
page.vanPageScroller =
|
typeof page.onPageScroll === 'function'
|
? [page.onPageScroll.bind(page), scroller.bind(this)]
|
: [scroller.bind(this)];
|
}
|
page.onPageScroll = onPageScroll;
|
},
|
detached() {
|
const page = getCurrentPage();
|
page.vanPageScroller = (page.vanPageScroller || []).filter(
|
(item) => item !== scroller
|
);
|
},
|
});
|