zhxy-desk/components/topBtn.vue

<template>
	<view class="top-btn">
		<view @click="cut(item,index)" v-for="(item,index) in list" :key="index" class="top-btn-item">
			{{item}}
			<view v-if="index == active" class="top-btn-item-color">

			</view>
		</view>
	</view>
</template>

<script>
	export default {
		name: "topBtn",
		props: {
			list: {
				type: Array,
				default: () => []

			},
			active: {
				type: Number,
				default: () => 0
			}
		},
		data() {
			return {

			};
		},
		methods: {
			cut(item, index) {

				this.$emit('update:active', index)
				this.$emit('click',item)
			}
		}
	}
</script>

<style lang="scss" scoped>
	.top-btn {
		width: 100%;
		box-sizing: border-box;
		display: flex;
		border-bottom: 1px solid #f2f2f2;
		padding-bottom: 32rpx;
        background-color: #fff;
		padding: 32rpx 0;
		.top-btn-item {
			flex: 1;
			display: flex;
			align-items: center;
			justify-content: center;
			position: relative;

			.top-btn-item-color {
				width: 150rpx;
				height: 8rpx;
				border-radius: 4rpx;
				background-color: rgba(5, 204, 161, 1);
				position: absolute;
				left: 50%;
				transform: translate(-50%, 0);
				bottom: -20rpx;
			}
		}
		.top-btn-item:nth-child(1){
			 border-right: 1px solid #f2f2f2 ;
		}
	}
</style>