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<template>
<!-- #ifdef APP-NVUE -->
<header>
<!-- #endif -->
<view
class="u-index-anchor u-border-bottom"
:ref="`u-index-anchor-${text}`"
:style="{
height: addUnit(height),
backgroundColor: bgColor
}"
>
<text
class="u-index-anchor__text"
:style="{
fontSize: addUnit(size),
color: color
}"
>{{ text }}</text>
</view>
<!-- #ifdef APP-NVUE -->
</header>
<!-- #endif -->
</template>
<script>
import { props } from './props';
import { mpMixin } from '../../libs/mixin/mpMixin';
import { mixin } from '../../libs/mixin/mixin';
import { addUnit, $parent, error } from '../../libs/function/index';
// #ifdef APP-NVUE
const dom = uni.requireNativePlugin('dom')
// #endif
/**
* IndexAnchor 列表锚点
* @description
* @tutorial https://uview-plus.jiangruyi.com/components/indexList.html
* @property {String | Number} text 列表锚点文本内容
* @property {String} color 列表锚点文字颜色 ( 默认 '#606266' )
* @property {String | Number} size 列表锚点文字大小,单位默认px ( 默认 14 )
* @property {String} bgColor 列表锚点背景颜色 ( 默认 '#dedede' )
* @property {String | Number} height 列表锚点高度,单位默认px ( 默认 32 )
* @example <u-index-anchor :text="indexList[index]"></u-index-anchor>
*/
export default {
name: 'u-index-anchor',
mixins: [mpMixin, mixin, props],
data() {
return {
}
},
mounted() {
this.init()
},
methods: {
addUnit,
init() {
// 此处会活动父组件实例,并赋值给实例的parent属性
const indexList = $parent.call(this, 'u-index-list')
if (!indexList) {
return error('u-index-anchor必须要搭配u-index-list组件使用')
}
// 将当前实例放入到u-index-list中
indexList.anchors.push(this)
const indexListItem = $parent.call(this, 'u-index-item')
// #ifndef APP-NVUE
// 只有在非nvue下,u-index-anchor才是嵌套在u-index-item中的
if (!indexListItem) {
return error('u-index-anchor必须要搭配u-index-item组件使用')
}
// 设置u-index-item的id为anchor的text标识符,因为非nvue下滚动列表需要依赖scroll-view滚动到元素的特性
indexListItem.id = this.text.charCodeAt(0)
// #endif
}
},
}
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
.u-index-anchor {
position: sticky;
top: 0;
@include flex;
align-items: center;
padding-left: 15px;
z-index: 1;
&__text {
@include flex;
align-items: center;
}
}
</style>