1、先有以下成绩单数据
scores = [
{ name: 'Bob', math: 97, chinese: 89, english: 67 },
{ name: 'Tom', math: 67, chinese: 52, english: 98 },
{ name: 'Jerry', math: 72, chinese: 87, english: 89 },
{ name: 'Ben', math: 92, chinese: 87, english: 59 },
{ name: 'Chan', math: 47, chinese: 85, english: 92 },
]
用table表格标签渲染以上数据，表格第一列是学生总分排名，最后一列是学生总分；
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title></title>
</head>
<body>
<div id="app">
<table border="1" >
<tr>
<th>id</th>
<th>name</th>
<th>math</th>
<th>chinese</th>
<th>english</th>
<th>total</th>
</tr>
<tr v-for="(score,i) in result">
<td>{{ i + 1 }}</td>
<td v-for="v in score">{{ v }}</td>
</tr>
</table>
</div>
</body>
<script src="js/vue.js"></script>
<script>
new Vue({
el: '#app',
data: {
scores:[
{ name: 'Bob', math: 97, chinese: 89, english: 67 },
{ name: 'Tom', math: 67, chinese: 52, english: 98 },
{ name: 'Jerry', math: 72, chinese: 87, english: 89 },
{ name: 'Ben', math: 92, chinese: 87, english: 59 },
{ name: 'Chan', math: 47, chinese: 85, english: 92 },
]
},
computed: {
result() {
// 按照总分数进行排名
for (let i = 0; i < this.scores.length - 1; i++) {
for (let j = 0; j < this.scores.length - 1 - i; j++) {
// 处理条件即可
if (this.scores[j].math + this.scores[j].chinese + this.scores[j].english < this.scores[j + 1].math + this.scores[j + 1].chinese + this.scores[j + 1].english) {
let temp = this.scores[j];
this.scores[j] = this.scores[j + 1];
this.scores[j + 1] = temp;
}
}
}
for (let i = 0; i < this.scores.length ; i++) {
this.scores[i]['total']=this.scores[i].math + this.scores[i].chinese + this.scores[i].english}
return this.scores;
console.log(this.scores);
},
}
});
</script>
</html>
2.还是采用上方相同的数据，采用相同的渲染规则，只渲染所有科目都及格了的学生。
#其他不变，把th下面的tr里面换成下面这样
<tr v-for="(p,i) in result" v-if="p.math > 60 && p.chinese > 60 && p.english > 60">
<td>{{ i + 1 }}</td>
<td v-for="v in p">{{ v }}</td>
</tr>
3.还是采用上方相同的数据，添加筛选规则：
i）有三个按钮：语文、数学、外语，点击谁谁高亮，且当前筛选规则采用哪门学科
ii）两个输入框，【】~【】，前面填最小分数，后面填最大分数，全部设置完毕后，表格的数据会被更新只渲染满足所有条件的结果
举例：点击语文，输入【86】~【87】，那就只会渲染Jerry和Ben两条数据
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<title>3</title>
<style>
.active {
background-color: pink;
}
</style>
</head>
<body>
<div id="app">
<div style="width: 400px; margin: 20px auto">
<button @click="subject = 'math'" :class="{active: subject === 'math'}">数学</button>
<button @click="subject = 'chinese'" :class="{active: subject === 'chinese'}">语文</button>
<button @click="subject = 'english'" :class="{active: subject === 'english'}">英语</button>
<input type="number" min="0" max="100" v-model="min">
~
<input type="number" min="0" max="100" v-model="max">
</div>
<table width="400" border="1" style="margin: auto" rules="all">
<tr>
<th>排名</th>
<th>姓名</th>
<th>数学</th>
<th>语文</th>
<th>英语</th>
<th>总分</th>
</tr>
<tbody v-if="subject === 'math'">
<tr v-for="(score, i) in scores" v-if="score.math>=min && score.math<=max || (!min || !max)">
<td>{{ i + 1 }}</td>
<td v-for="v in score">{{v}}</td>
</tr>
</tbody>
<tbody v-else-if="subject === 'chinese'">
<tr v-for="(score, i) in scores" v-if="score.chinese>=min && score.chinese<=max || (!min || !max)">
<td>{{ i + 1 }}</td>
<td v-for="v in score">{{v}}</td>
</tr>
</tbody>
<tbody v-else-if="subject === 'english'">
<tr v-for="(score, i) in scores" v-if="score.english>=min && score.english<=max || (!min || !max)">
<td>{{ i + 1 }}</td>
<td v-for="v in score">{{v}}</td>
</tr>
</tbody>
<tbody v-else>
<tr v-for="(score, i) in scores">
<td>{{ i + 1 }}</td>
<td v-for="v in score">{{v}}</td>
</tr>
</tbody>
</table>
</div>
</body>
<script src="js/vue.js"></script>
<script>
`
let scores = null;
$.ajax({
url:'',
success(response) {
scores = response.data
}
});
`;
// 模拟当前页面加载成功，从后台获取操作的数据
let scores = [
{ name: 'Bob', math: 97, chinese: 89, english: 67 },
{ name: 'Tom', math: 67, chinese: 52, english: 98 },
{ name: 'Jerry', math: 72, chinese: 87, english: 89 },
{ name: 'Ben', math: 92, chinese: 87, english: 59 },
{ name: 'Chan', math: 47, chinese: 85, english: 92 },
];
// 补充：for in遍历的是取值关键 | for of遍历的是值
// 添加总分
for (score of scores) {
score.total = score.math + score.chinese + score.english;
}
// console.log(scores);
// 按照总分排序
for (let i=0; i<scores.length-1; i++) {
for (let j=0; j<scores.length-1-i; j++) {
if (scores[j].total < scores[j+1].total) {
let temp = scores[j];
scores[j] = scores[j+1];
scores[j+1] = temp;
}
}
}
console.log(scores);
new Vue({
el: '#app',
data: {
// 属性名与值为变量的变量名相同，可以简写省略值
scores,
min: '',
max: '',
subject: '',
}
})
</script>
</html>
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