perf(@vant/lazyload): remove edge 15 polyfill

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

@@ -1,70 +1,68 @@
 import { h } from 'vue';
 import { inBrowser } from './util';
 
-export default (lazy) => {
-  return {
-    props: {
-      tag: {
-        type: String,
-        default: 'div',
+export default (lazy) => ({
+  props: {
+    tag: {
+      type: String,
+      default: 'div',
+    },
+  },
+
+  emits: ['show'],
+
+  render() {
+    return h(
+      this.tag,
+      this.show && this.$slots.default ? this.$slots.default() : null
+    );
+  },
+
+  data() {
+    return {
+      el: null,
+      state: {
+        loaded: false,
       },
+      rect: {},
+      show: false,
+    };
+  },
+
+  mounted() {
+    this.el = this.$el;
+    lazy.addLazyBox(this);
+    lazy.lazyLoadHandler();
+  },
+
+  beforeUnmount() {
+    lazy.removeComponent(this);
+  },
+
+  methods: {
+    getRect() {
+      this.rect = this.$el.getBoundingClientRect();
     },
 
-    emits: ['show'],
-
-    render() {
-      return h(
-        this.tag,
-        this.show && this.$slots.default ? this.$slots.default() : null
+    checkInView() {
+      this.getRect();
+      return (
+        inBrowser &&
+        this.rect.top < window.innerHeight * lazy.options.preLoad &&
+        this.rect.bottom > 0 &&
+        this.rect.left < window.innerWidth * lazy.options.preLoad &&
+        this.rect.right > 0
       );
     },
 
-    data() {
-      return {
-        el: null,
-        state: {
-          loaded: false,
-        },
-        rect: {},
-        show: false,
-      };
+    load() {
+      this.show = true;
+      this.state.loaded = true;
+      this.$emit('show', this);
     },
 
-    mounted() {
-      this.el = this.$el;
-      lazy.addLazyBox(this);
-      lazy.lazyLoadHandler();
+    destroy() {
+      return this.$destroy;
     },
-
-    beforeUnmount() {
-      lazy.removeComponent(this);
-    },
-
-    methods: {
-      getRect() {
-        this.rect = this.$el.getBoundingClientRect();
-      },
-
-      checkInView() {
-        this.getRect();
-        return (
-          inBrowser &&
-          this.rect.top < window.innerHeight * lazy.options.preLoad &&
-          this.rect.bottom > 0 &&
-          this.rect.left < window.innerWidth * lazy.options.preLoad &&
-          this.rect.right > 0
-        );
-      },
-
-      load() {
-        this.show = true;
-        this.state.loaded = true;
-        this.$emit('show', this);
-      },
-
-      destroy() {
-        return this.$destroy;
-      },
-    },
-  };
-};
+  },
+});