start

miniprogram_npm/tdesign-miniprogram/back-top/README.en-US.md

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+:: BASE_DOC ::
+
+## API
+
+### BackTop Props
+
+name | type | default | description | required
+-- | -- | -- | -- | --
+style | Object | - | CSS(Cascading Style Sheets) | N
+custom-style | Object | - | CSS(Cascading Style Sheets)，used to set style on virtual component | N
+fixed | Boolean | true | \- | N
+icon | String / Boolean / Object / Slot | true | [see more ts definition](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
+scroll-top | Number | 0 | \- | N
+text | String | '' | \- | N
+theme | String | round | options: round/half-round/round-dark/half-round-dark | N
+visibility-height | Number | 200 | \- | N
+
+### BackTop Events
+
+name | params | description
+-- | -- | --
+to-top | \- | \-
+### BackTop External Classes
+
+className | Description
+-- | --
+t-class | \-
+t-class-icon | \-
+t-class-text | \-
+
+### CSS Variables
+
+The component provides the following CSS variables, which can be used to customize styles.
+Name | Default Value | Description 
+-- | -- | --
+--td-back-top-round-bg-color | @font-white-1 | - 
+--td-back-top-round-border-color | @component-border | - 
+--td-back-top-round-border-radius | @radius-circle | - 
+--td-back-top-round-color | @font-gray-1 | - 
+--td-back-top-round-dark-bg-color | @gray-color-14 | - 
+--td-back-top-round-dark-color | @font-white-1 | -

miniprogram_npm/tdesign-miniprogram/back-top/README.md

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+---
+title: BackTop 返回顶部
+description: 用于当页面过长往下滑动时，帮助用户快速回到页面顶部。
+spline: navigation
+isComponent: true
+---
+
+<span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20lines-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20functions-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20statements-100%25-blue" /></span><span class="coverages-badge" style="margin-right: 10px"><img src="https://img.shields.io/badge/coverages%3A%20branches-100%25-blue" /></span>
+## 引入
+
+全局引入，在 miniprogram 根目录下的`app.json`中配置，局部引入，在需要引入的页面或组件的`index.json`中配置。
+
+```json
+"usingComponents": {
+"t-back-top": "tdesign-miniprogram/back-top/back-top",
+}
+```
+
+## 代码演示
+
+<a href="https://developers.weixin.qq.com/s/2aR1demj7aS2" title="在开发者工具中预览效果" target="_blank" rel="noopener noreferrer"> 在开发者工具中预览效果 </a>
+
+<blockquote style="background-color: #d9e1ff; font-size: 15px; line-height: 26px;margin: 16px 0 0;padding: 16px; border-radius: 6px; color: #0052d9" >
+<p>Tips: 请确保开发者工具为打开状态。导入开发者工具后，依次执行：npm i > 构建npm包 > 勾选 "将JS编译成ES5"</p>
+</blockquote>
+
+
+<img src="https://tdesign.gtimg.com/miniprogram/readme/backtop-1.png" width="375px" height="50%">
+
+### 基础返回顶部
+
+{{ base }}
+
+## API
+
+### BackTop Props
+
+名称 | 类型 | 默认值 | 描述 | 必传
+-- | -- | -- | -- | --
+style | Object | - | 样式 | N
+custom-style | Object | - | 样式，一般用于开启虚拟化组件节点场景 | N
+fixed | Boolean | true | 是否绝对定位固定到屏幕右下方 | N
+icon | String / Boolean / Object / Slot | true | 图标。值为 `false` 表示不显示图标。不传表示使用默认图标 `'backtop'`。[通用类型定义](https://github.com/Tencent/tdesign-miniprogram/blob/develop/src/common/common.ts) | N
+scroll-top | Number | 0 | 页面滚动距离 | N
+text | String | '' | 文案 | N
+theme | String | round | 预设的样式类型。可选项：round/half-round/round-dark/half-round-dark | N
+visibility-height | Number | 200 | 滚动高度达到此参数值才出现 | N
+
+### BackTop Events
+
+名称 | 参数 | 描述
+-- | -- | --
+to-top | \- | 点击触发
+### BackTop External Classes
+
+类名 | 描述
+-- | --
+t-class | 根节点样式类
+t-class-icon | 图标样式类
+t-class-text | 文本样式类
+
+### CSS Variables
+
+组件提供了下列 CSS 变量，可用于自定义样式。
+名称 | 默认值 | 描述 
+-- | -- | --
+--td-back-top-round-bg-color | @font-white-1 | - 
+--td-back-top-round-border-color | @component-border | - 
+--td-back-top-round-border-radius | @radius-circle | - 
+--td-back-top-round-color | @font-gray-1 | - 
+--td-back-top-round-dark-bg-color | @gray-color-14 | - 
+--td-back-top-round-dark-color | @font-white-1 | -

miniprogram_npm/tdesign-miniprogram/back-top/back-top.d.ts

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+import { SuperComponent, RelationsOptions } from '../common/src/index';
+export default class BackTop extends SuperComponent {
+    externalClasses: string[];
+    options: {
+        multipleSlots: boolean;
+    };
+    properties: import("./type").TdBackTopProps;
+    relations: RelationsOptions;
+    data: {
+        prefix: string;
+        classPrefix: string;
+        _icon: any;
+        hidden: boolean;
+    };
+    observers: {
+        icon(): void;
+        scrollTop(value: number): void;
+    };
+    lifetimes: {
+        ready(): void;
+    };
+    methods: {
+        setIcon(v: any): void;
+        toTop(): void;
+    };
+}

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

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+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,
+            hidden: true,
+        };
+        this.observers = {
+            icon() {
+                this.setIcon();
+            },
+            scrollTop(value) {
+                const { visibilityHeight } = this.properties;
+                this.setData({ hidden: value < visibilityHeight });
+            },
+        };
+        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);
+                    this.setData({ hidden: true });
+                }
+                else {
+                    wx.pageScrollTo({
+                        scrollTop: 0,
+                        duration: 300,
+                    });
+                }
+            },
+        };
+    }
+};
+BackTop = __decorate([
+    wxComponent()
+], BackTop);
+export default BackTop;

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

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+{
+  "component": true,
+  "styleIsolation": "apply-shared",
+  "usingComponents": {
+    "t-icon": "../icon/icon"
+  }
+}

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

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+<import src="../common/template/icon.wxml" />
+<wxs src="../common/utils.wxs" module="_" />
+
+<view
+  style="{{_._style([style, customStyle])}}"
+  class="class {{prefix}}-class {{_.cls(classPrefix, [['fixed', fixed], theme])}}"
+  bindtap="toTop"
+  aria-role="button"
+  hidden="{{hidden}}"
+>
+  <view class="{{classPrefix}}__icon" aria-hidden>
+    <slot name="icon" />
+    <template wx:if="{{_icon}}" is="icon" data="{{tClass: prefix + '-class-icon', ..._icon }}" />
+  </view>
+  <view wx:if="{{!!text}}" class="{{classPrefix}}__text--{{theme}} {{prefix}}-class-text">{{text}}</view>
+  <slot />
+</view>

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

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+.t-float-left {
+  float: left;
+}
+.t-float-right {
+  float: right;
+}
+@keyframes tdesign-fade-out {
+  from {
+    opacity: 1;
+  }
+  to {
+    opacity: 0;
+  }
+}
+.hotspot-expanded.relative {
+  position: relative;
+}
+.hotspot-expanded::after {
+  content: '';
+  display: block;
+  position: absolute;
+  left: 0;
+  top: 0;
+  right: 0;
+  bottom: 0;
+  transform: scale(1.5);
+}
+.t-back-top {
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  background-color: transparent;
+  overflow: hidden;
+  box-sizing: border-box;
+  transition: height 0.2s;
+  height: auto;
+}
+.t-back-top--fixed {
+  position: fixed;
+  right: var(--td-spacer, 16rpx);
+  bottom: calc(var(--td-spacer-2, 32rpx) + env(safe-area-inset-bottom));
+}
+.t-back-top--round,
+.t-back-top--round-dark {
+  width: 96rpx;
+  height: 96rpx;
+  border-radius: var(--td-back-top-round-border-radius, var(--td-radius-circle, 50%));
+}
+.t-back-top--round,
+.t-back-top--half-round {
+  color: var(--td-back-top-round-color, var(--td-text-color-primary, var(--td-font-gray-1, rgba(0, 0, 0, 0.9))));
+  border: 1rpx solid var(--td-back-top-round-border-color, var(--td-component-border, var(--td-gray-color-4, #dcdcdc)));
+  background-color: var(--td-back-top-round-bg-color, var(--td-bg-color-container, var(--td-font-white-1, #ffffff)));
+}
+.t-back-top--round-dark,
+.t-back-top--half-round-dark {
+  color: var(--td-back-top-round-dark-color, var(--td-text-color-anti, var(--td-font-white-1, #ffffff)));
+  background-color: var(--td-back-top-round-dark-bg-color, var(--td-gray-color-13, #242424));
+}
+.t-back-top--half-round,
+.t-back-top--half-round-dark {
+  width: 120rpx;
+  height: 80rpx;
+  border-radius: 0;
+  border-top-left-radius: var(--td-back-top-half-round-border-radius, var(--td-radius-round, 999px));
+  border-bottom-left-radius: var(--td-back-top-half-round-border-radius, var(--td-radius-round, 999px));
+  flex-direction: row;
+  right: 0;
+}
+.t-back-top__text--round,
+.t-back-top__text--round-dark,
+.t-back-top__text--half-round,
+.t-back-top__text--half-round-dark {
+  font-size: var(--td-font-size, 20rpx);
+  line-height: 24rpx;
+}
+.t-back-top__text--half-round,
+.t-back-top__text--half-round-dark {
+  width: 48rpx;
+}
+.t-back-top__icon:not(:empty) + .t-back-top__text--half-round,
+.t-back-top__icon:not(:empty) + .t-back-top__text--half-round-dark {
+  margin-left: 8rpx;
+}
+.t-back-top__icon {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  font-size: 44rpx;
+}

miniprogram_npm/tdesign-miniprogram/back-top/props.d.ts

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+import { TdBackTopProps } from './type';
+declare const props: TdBackTopProps;
+export default props;

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

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+const props = {
+    fixed: {
+        type: Boolean,
+        value: true,
+    },
+    icon: {
+        type: null,
+        value: true,
+    },
+    scrollTop: {
+        type: Number,
+        value: 0,
+    },
+    style: {
+        type: String,
+        value: '',
+    },
+    text: {
+        type: String,
+        value: '',
+    },
+    theme: {
+        type: String,
+        value: 'round',
+    },
+    visibilityHeight: {
+        type: Number,
+        value: 200,
+    },
+};
+export default props;

miniprogram_npm/tdesign-miniprogram/back-top/type.d.ts

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+export interface TdBackTopProps {
+    fixed?: {
+        type: BooleanConstructor;
+        value?: boolean;
+    };
+    icon?: {
+        type: null;
+        value?: string | boolean | object;
+    };
+    scrollTop?: {
+        type: NumberConstructor;
+        value?: number;
+    };
+    style?: {
+        type: StringConstructor;
+        value?: string;
+    };
+    text?: {
+        type: StringConstructor;
+        value?: string;
+    };
+    theme?: {
+        type: StringConstructor;
+        value?: 'round' | 'half-round' | 'round-dark' | 'half-round-dark';
+    };
+    visibilityHeight?: {
+        type: NumberConstructor;
+        value?: number;
+    };
+}

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

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+export {};