小程序npm和node模块

node_modules/@vant/weapp/dist/mixins/page-scroll.js

@@ -0,0 +1,42 @@
+import { isFunction } from '../common/validator';
+import { getCurrentPage, isDef } from '../common/utils';
+function onPageScroll(event) {
+    const { vanPageScroller = [] } = getCurrentPage();
+    vanPageScroller.forEach((scroller) => {
+        if (typeof scroller === 'function') {
+            // @ts-ignore
+            scroller(event);
+        }
+    });
+}
+export function pageScrollMixin(scroller) {
+    return Behavior({
+        attached() {
+            const page = getCurrentPage();
+            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() {
+            const page = getCurrentPage();
+            if (!isDef(page) || !isDef(page.vanPageScroller)) {
+                return;
+            }
+            const { vanPageScroller } = page;
+            const index = vanPageScroller.findIndex((v) => v === this._scroller);
+            if (index > -1) {
+                page.vanPageScroller.splice(index, 1);
+            }
+            this._scroller = undefined;
+        },
+    });
+}