vue实现学生成绩管理案例

实现了学生成绩的管理,可以增加科目成绩,不及格的成绩自动标红,删除成绩,实现总分统计、平均分计算。
vue实现学生成绩管理案例_第1张图片

html代码

DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8" />
  <meta http-equiv="X-UA-Compatible" content="IE=edge" />
  <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  <link rel="stylesheet" href="./styles/index.css" />
  <title>Documenttitle>
head>

<body>
  <div id="app" class="score-case">
    <div class="table">
      <table>
        <thead>
          <tr>
            <th>编号th>
            <th>科目th>
            <th>成绩th>
            <th>操作th>
          tr>
        thead>
        <tbody v-if="list.length>0">
          <tr v-for="(item,index) in list" :key="item.id">
            <td>{{index+1}}td>
            <td>{{item.subject}}td>
            <td :class="{red: item.score<60}">{{item.score}}td>
            <td><a href="#" @click.prevent="del(item.id)">删除a>td>
          tr>

        tbody>
        <tbody v-else>
          <tr>
            <td colspan="5">
              <span class="none">暂无数据span>
            td>
          tr>
        tbody>

        <tfoot>
          <tr>
            <td colspan="5">
              <span>总分:{{totalScore}}span>
              <span style="margin-left: 50px">平均分:{{average}}span>
            td>
          tr>
        tfoot>
      table>
    div>
    <div class="form">
      <div class="form-item">
        <div class="label">科目:div>
        <div class="input">
          <input type="text" placeholder="请输入科目" v-model.trim="subject" />
        div>
      div>
      <div class="form-item">
        <div class="label">分数:div>
        <div class="input">
          <input type="text" placeholder="请输入分数" v-model.number="score" />
        div>
      div>
      <div class="form-item">
        <div class="label">div>
        <div class="input">
          <button class="submit" @click="add">添加button>
        div>
      div>
    div>
  div>
  <script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js">script>

  <script>
    const app = new Vue({
      el: '#app',
      data: {
        list: [
          { id: 1, subject: '语文', score: 20 },
          { id: 7, subject: '数学', score: 99 },
          { id: 12, subject: '英语', score: 70 },
        ],
        subject: '',
        score: ''
      },
      methods: {
        add() {
          if (typeof this.score !== 'number') {
            alert('请输入正确的成绩')
            return
          }
          this.list.unshift({
            id: +new Date(),
            subject: this.subject,
            score: this.score
          })
          this.subject = '',
            this.score = ''
        },
        del(id) {
          this.list = this.list.filter(item => item.id != id)
        }
      },
      computed: {
        totalScore() {
          return this.list.reduce((sum, item) => (sum + item.score), 0)

        },
        average() {
          if (this.list.length === 0) {
            return 0
          }
          return (this.totalScore / this.list.length).toFixed(2)
        }
      }
    })
  script>
body>

html>

css样式

.score-case {
  width: 1000px;
  margin: 50px auto;
  display: flex;
}
.score-case .table {
  flex: 4;
}
.score-case .table table {
  width: 100%;
  border-spacing: 0;
  border-top: 1px solid #ccc;
  border-left: 1px solid #ccc;
}
.score-case .table table th {
  background: #f5f5f5;
}
.score-case .table table tr:hover td {
  background: #f5f5f5;
}
.score-case .table table td,
.score-case .table table th {
  border-bottom: 1px solid #ccc;
  border-right: 1px solid #ccc;
  text-align: center;
  padding: 10px;
}
.score-case .table table td.red,
.score-case .table table th.red {
  color: red;
}
.score-case .table .none {
  height: 100px;
  line-height: 100px;
  color: #999;
}
.score-case .form {
  flex: 1;
  padding: 20px;
}
.score-case .form .form-item {
  display: flex;
  margin-bottom: 20px;
  align-items: center;
}
.score-case .form .form-item .label {
  width: 60px;
  text-align: right;
  font-size: 14px;
}
.score-case .form .form-item .input {
  flex: 1;
}
.score-case .form .form-item input,
.score-case .form .form-item select {
  appearance: none;
  outline: none;
  border: 1px solid #ccc;
  width: 200px;
  height: 40px;
  box-sizing: border-box;
  padding: 10px;
  color: #666;
}
.score-case .form .form-item input::placeholder {
  color: #666;
}
.score-case .form .form-item .cancel,
.score-case .form .form-item .submit {
  appearance: none;
  outline: none;
  border: 1px solid #ccc;
  border-radius: 4px;
  padding: 4px 10px;
  margin-right: 10px;
  font-size: 12px;
  background: #ccc;
}
.score-case .form .form-item .submit {
  border-color: #069;
  background: #069;
  color: #fff;
}

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