yshi/fuintUniapp/uview-ui/components/u-index-anchor/u-index-anchor.vue

<template>
    <!-- 支付宝小程序使用$u.getRect()获取组件的根元素尺寸，所以在外面套一个"壳" -->
    <view>
        <view class="u-index-anchor-wrapper" :id="$u.guid()" :style="[wrapperStyle]">
            <view class="u-index-anchor " :class="[active ? 'u-index-anchor--active' : '']" :style="[customAnchorStyle]">
                <slot v-if="useSlot" />
                <block v-else>
                    <text>{{ index }}</text>
                </block>
            </view>
        </view>
    </view>
</template>

<script>
    /**
     * indexAnchor 索引列表锚点
     * @description 通过折叠面板收纳内容区域,搭配<u-index-anchor>使用
     * @tutorial https://www.uviewui.com/components/indexList.html#indexanchor-props
     * @property {Boolean} use-slot 是否使用自定义内容的插槽（默认false）
     * @property {String Number} index 索引字符，如果定义了use-slot，此参数自动失效
     * @property {Object} custStyle 自定义样式，对象形式，如"{color: 'red'}"
     * @event {Function} default 锚点位置显示内容，默认为索引字符
     * @example <u-index-anchor :index="item" />
     */
    export default {
        name: "u-index-anchor",
        props: {
            useSlot: {
                type: Boolean,
                default: false
            },
            index: {
                type: String,
                default: ''
            },
            customStyle: {
                type: Object,
                default () {
                    return {}
                }
            }
        },
        data() {
            return {
                active: false,
                wrapperStyle: {},
                anchorStyle: {}
            }
        },
        created() {
            this.parent = false;
        },
        mounted() {
            this.parent = this.$u.$parent.call(this, 'u-index-list');
            if(this.parent) {
                this.parent.children.push(this);
                this.parent.updateData();
            }
        },
        computed: {
            customAnchorStyle() {
                return Object.assign(this.anchorStyle, this.customStyle);
            }
        }
    }
</script>

<style lang="scss" scoped>
    @import "../../libs/css/style.components.scss";
    
    .u-index-anchor {
        box-sizing: border-box;
        padding: 14rpx 24rpx;
        color: #606266;
        width: 100%;
        font-weight: 500;
        font-size: 28rpx;
        line-height: 1.2;
        background-color: rgb(245, 245, 245);
    }

    .u-index-anchor--active {
        right: 0;
        left: 0;
        color: #2979ff;
        background-color: #fff;
    }
</style>