Function attached

packages/mixins/page-scroll.ts:25–46

(this: WechatMiniprogram.Component.TrivialInstance)

export function pageScrollMixin(scroller: Scroller) {
  return Behavior({
    attached(this: WechatMiniprogram.Component.TrivialInstance) {
      const page = getCurrentPage<{ vanPageScroller: Scroller[] }>();

      if (!isDef(page)) {
        return;
      }

      const _scroller = scroller.bind(this);

      const { vanPageScroller = [] } = page;

      if (isFunction(page.onPageScroll) && page.onPageScroll !== onPageScroll) {
        vanPageScroller.push(page.onPageScroll.bind(page));
      }

      vanPageScroller.push(_scroller);

      page.vanPageScroller = vanPageScroller;
      page.onPageScroll = onPageScroll;

      this._scroller = _scroller;
    },

    detached(this: WechatMiniprogram.Component.TrivialInstance) {
      const page = getCurrentPage<{ vanPageScroller: Scroller[] }>();