实现一个像这样的五星打分

<template><div> <div class="mask"><div class="pop"></div><div class="box center_box"><p class="center title">评价</p><div style="margin: 23px 0 30px;"><span v-for="(item, index) in star" :key=index class="s" :class="{'active':index <= s_l}" @click="getStar(index)"></span><span class="s5 fr">{{score}}分</span></div><textarea placeholder="请输入对此服务的评价" v-model="content"></textarea></div></div></div>
</template>export default {data() {return {score: 0,content: '',star: [0,1,2,3,4],s_l: -1,old_index: null,}},computed: {...mapState(['userInfo'])},methods: {getStar(index)  {if (this.old_index == index) {this.s_l = index - 1;this.score--;this.old_index--;return}this.s_l = index;this.score = index+1;this.old_index = index;}}}
<style lang='scss' scoped>.fr {float: left;}.center {text-align: center;}.center_box {position: absolute;left: 50%;top: 50%;transform: translate(-50%, -50%);-webkit-transform: translate(-50%, -50%);}.mask {.pop {position: fixed;left: 0;top: 0;width: 100%;height: 100%;background: #000;opacity: 0.3;}.box {color: #333;background: #fff;padding: 27px 70px;border-radius: 20px;.title {font-size: 24px;}.s {display: inline-block;width: 35px;height: 35px;margin-right: 10px;background: url('data:image/png;base64,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') no-repeat center center;background-size: cover;cursor: pointer;&.active {background-image: url('data:image/png;base64,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');}}.s5 {font-size: 24px;}textarea {width: 370px;height: 140px;padding: 19px;border: 1px solid #cccccc;border-radius: 20px;}}}</style>