chore(lazyload): remove some legecy code (#8650)

packages/vant-lazyload/src/lazy-container.js

@@ -1,5 +1,5 @@
 /* eslint-disable max-classes-per-file */
-import { find, remove, ArrayFrom } from './util';
+import { find, remove } from './util';
 
 const defaultOptions = {
   selector: 'img',
@@ -44,7 +44,7 @@ class LazyContainer {
   }
 
   getImgs() {
-    return ArrayFrom(this.el.querySelectorAll(this.options.selector));
+    return Array.from(this.el.querySelectorAll(this.options.selector));
   }
 
   clear() {
@@ -57,10 +57,9 @@ class LazyContainer {
   }
 }
 
-export default class LazyContainerMananger {
+export default class LazyContainerManager {
   constructor({ lazy }) {
     this.lazy = lazy;
-    lazy.lazyContainerMananger = this;
     this._queue = [];
   }
 

packages/vant-lazyload/src/lazy.js

@@ -3,7 +3,6 @@ import {
   inBrowser,
   CustomEvent,
   remove,
-  some,
   find,
   _,
   throttle,
@@ -52,7 +51,6 @@ export default function () {
       observer,
       observerOptions,
     }) {
-      this.version = '__VUE_LAZYLOAD_VERSION__';
       this.mode = modeType.event;
       this.ListenerQueue = [];
       this.TargetIndex = 0;
@@ -126,7 +124,7 @@ export default function () {
      * @return
      */
     add(el, binding, vnode) {
-      if (some(this.ListenerQueue, (item) => item.el === el)) {
+      if (this.ListenerQueue.some((item) => item.el === el)) {
         this.update(el, binding);
         return nextTick(this.lazyLoadHandler);
       }

packages/vant-lazyload/src/listener.js

@@ -1,12 +1,5 @@
 import { loadImageAsync, noop } from './util';
 
-// el: {
-//     state,
-//     src,
-//     error,
-//     loading
-// }
-
 export default class ReactiveListener {
   constructor({
     el,

packages/vant-lazyload/src/util.js

@@ -57,17 +57,6 @@ function remove(arr, item) {
   if (index > -1) return arr.splice(index, 1);
 }
 
-function some(arr, fn) {
-  let has = false;
-  for (let i = 0, len = arr.length; i < len; i++) {
-    if (fn(arr[i])) {
-      has = true;
-      break;
-    }
-  }
-  return has;
-}
-
 function getBestSelectionFromSrcset(el, scale) {
   if (el.tagName !== 'IMG' || !el.getAttribute('data-srcset')) return;
 
@@ -290,15 +279,6 @@ function isObject(obj) {
   return obj !== null && typeof obj === 'object';
 }
 
-function ArrayFrom(arrLike) {
-  const len = arrLike.length;
-  const list = [];
-  for (let i = 0; i < len; i++) {
-    list.push(arrLike[i]);
-  }
-  return list;
-}
-
 function noop() {}
 
 class ImageCache {
@@ -331,10 +311,8 @@ export {
   inBrowser,
   CustomEvent,
   remove,
-  some,
   find,
   noop,
-  ArrayFrom,
   _,
   isObject,
   throttle,