bug fix and performance improvements

miniprogram/miniprogram_npm/tdesign-miniprogram/back-top/back-top.js

@@ -0,0 +1,67 @@
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+import { SuperComponent, wxComponent } from '../common/src/index';
+import config from '../common/config';
+import props from './props';
+import { calcIcon } from '../common/utils';
+const { prefix } = config;
+const name = `${prefix}-back-top`;
+let BackTop = class BackTop extends SuperComponent {
+    constructor() {
+        super(...arguments);
+        this.externalClasses = [`${prefix}-class`, `${prefix}-class-icon`, `${prefix}-class-text`];
+        this.options = {
+            multipleSlots: true,
+        };
+        this.properties = props;
+        this.relations = {
+            '../pull-down-refresh/pull-down-refresh': {
+                type: 'ancestor',
+            },
+        };
+        this.data = {
+            prefix,
+            classPrefix: name,
+            _icon: null,
+        };
+        this.observers = {
+            icon() {
+                this.setIcon();
+            },
+        };
+        this.lifetimes = {
+            ready() {
+                const { icon } = this.properties;
+                this.setIcon(icon);
+            },
+        };
+        this.methods = {
+            setIcon(v) {
+                this.setData({
+                    _icon: calcIcon(v, 'backtop'),
+                });
+            },
+            toTop() {
+                var _a;
+                this.triggerEvent('to-top');
+                if (this.$parent) {
+                    (_a = this.$parent) === null || _a === void 0 ? void 0 : _a.setScrollTop(0);
+                }
+                else {
+                    wx.pageScrollTo({
+                        scrollTop: 0,
+                        duration: 300,
+                    });
+                }
+            },
+        };
+    }
+};
+BackTop = __decorate([
+    wxComponent()
+], BackTop);
+export default BackTop;