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 | | export default { |  |     props: { |  |         // 返回顶部的形状,circle-圆形,square-方形 |  |         mode: { |  |             type: String, |  |             default: uni.$u.props.backtop.mode |  |         }, |  |         // 自定义图标 |  |         icon: { |  |             type: String, |  |             default: uni.$u.props.backtop.icon |  |         }, |  |         // 提示文字 |  |         text: { |  |             type: String, |  |             default: uni.$u.props.backtop.text |  |         }, |  |         // 返回顶部滚动时间 |  |         duration: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.duration |  |         }, |  |         // 滚动距离 |  |         scrollTop: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.scrollTop |  |         }, |  |         // 距离顶部多少距离显示,单位px |  |         top: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.top |  |         }, |  |         // 返回顶部按钮到底部的距离,单位px |  |         bottom: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.bottom |  |         }, |  |         // 返回顶部按钮到右边的距离,单位px |  |         right: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.right |  |         }, |  |         // 层级 |  |         zIndex: { |  |             type: [String, Number], |  |             default: uni.$u.props.backtop.zIndex |  |         }, |  |         // 图标的样式,对象形式 |  |         iconStyle: { |  |             type: Object, |  |             default: uni.$u.props.backtop.iconStyle |  |         } |  |     } |  | } | 
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