Vue实现多标签选择器

257 阅读 0 评论 170 点赞

我是靠谱客的博主孤独百褶裙，这篇文章主要介绍Vue实现多标签选择器，现在分享给大家，希望可以做个参考。

本文实例为大家分享了Vue实现多标签选择器展示的具体代码，供大家参考，具体内容如下

实现效果

实现代码

复制代码

<head>
 <title>Document</title>

<link rel="stylesheet" href="static/element-ui/index.css" >
 <script src="static/element-ui/vue.js"></script>
 <script src="static/element-ui/index.js"></script>

<body>

<div id="app">
  
  <div v-for='(category, categoryIndex) in categories' :key="category.id">
   
   <span class="not-active">{{category.name}}：</span>

<template v-for='(child, childIndex) in category.children'>
    <my-tag v-if="child.active" :closable='true' @click-child='clickChild(category, categoryIndex, child, childIndex)'>
     {{ child.name }}
    </my-tag>
    <span v-else class="not-active" @click='clickChild(category, categoryIndex, child, childIndex)'>{{ child.name }}</span>
   </template>
  </div>

<div v-if='conditions.length'>
   <span class="not-active" @click="clearCondition">清空已选：<span>
    
   <el-tag
   v-for='(condition, index) in conditions' 
   :key="condition.id"
   type="primary"
   :closable="true"
   size="small"
   :disable-transitions="true"
   @close='removeCondition(condition, index)'
   @click='removeCondition(condition, index)'>
    {{condition.name}}
   </el-tag>
  </div>
 </div>

methods: {
    clickChild() {
     this.$emit("click-child")
    }
   }
  });

var app = new Vue({
   el: '#app',
   data() {
    return {
     categories, // 分类标签，可从外部加载配置
     conditions: [] // 已选条件
    }
   },

watch: {
    // 监听条件变化，按照请求接口拼装请求参数
    conditions(val){
     let selectedCondition = {};

for(let categorie of this.categories){
      let selected_list = [];
      for(let child of categorie.children){
       if(child.active){
        selected_list.push(child.name);
       }
      }
      selectedCondition[categorie.name] = selected_list.join("|")
     }
     console.log(selectedCondition);
    }
   },

methods: {
    // 处理标签点击事件，未选中则选中，已选中则取消选中
    clickChild(category, categoryIndex, child, childIndex) {
     let uid = `${categoryIndex}-${childIndex}`
     child.uid = uid;
     console.log(uid)
     
     // 取消选择
     if (child.active === true) {
      category.count--;
      child.active = false;
      this.conditions.forEach((conditionChild, index) => {
       if (conditionChild.uid === child.uid) {
        this.conditions.splice(index, 1);
       }
      });
     // 选择
     } else {
      category.count++;
      child.active = true;
      this.conditions.push(child);
     }
    },
   
    // 清除已选整个类别标签
    clearCategory(category, categoryIndex) {
     category.count = 0;
     
     // 可选列表均为未选中状态
     category.children.forEach(child => {
      child.active = false;
     })

// 清空该类已选元素
     for (let index = this.conditions.length - 1; index >= 0; index--) {
      const conditionChild = this.conditions[index];
      if (conditionChild.uid.startsWith(categoryIndex)) {
       this.conditions.splice(index, 1);
      }
     }
    },
    
    // 移除一个条件
    removeCondition(condition, index) {
     let categoryIndex = condition.uid.split("-")[0];
     this.categories[categoryIndex].count --;

this.conditions.splice(index, 1)
     condition.active = false;
    },

// 清空所有条件
    clearCondition() {
     for(let i = this.conditions.length-1; i >=0 ; i--){
      this.removeCondition(this.conditions[i], i);
     }
    }
   }
  });
 </script>

</body>

</html>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
<html lang="en">

<head>
 <title>Document</title>

 <!-- 引入本地组件库 -->
 <link rel="stylesheet" href="static/element-ui/index.css" >
 <script src="static/element-ui/vue.js"></script>
 <script src="static/element-ui/index.js"></script>

 <!-- 引入CDN样式 -->
 <!-- <link rel="stylesheet" href="https://unpkg.com/element-ui/lib/theme-chalk/index.css" > -->
 <!-- <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script> -->
 <!-- <script src="https://unpkg.com/element-ui/lib/index.js"></script> -->

 <style>
  .not-active {
   display: inline-block;
   font-size: 12px;
   margin: 5px 8px;
  }
  
  span {
   margin: 0 2px;
  }
 </style>
</head>

<body>

 <div id="app">
  <!-- 待选标签 -->
  <div v-for='(category, categoryIndex) in categories' :key="category.id">
   <!-- 分类 -->
   <span class="not-active">{{category.name}}：</span>

   <template>
    <span v-if="category.count"class="not-active" @click="clearCategory(category, categoryIndex)"> 不限</span>
    <my-tag v-else>不限</my-tag>
   </template>

   <!-- 标签 -->
   <template v-for='(child, childIndex) in category.children'>
    <my-tag v-if="child.active" :closable='true' @click-child='clickChild(category, categoryIndex, child, childIndex)'>
     {{ child.name }}
    </my-tag>
    <span v-else class="not-active" @click='clickChild(category, categoryIndex, child, childIndex)'>{{ child.name }}</span>
   </template>
  </div>

  <!-- 已选标签 -->
  <div v-if='conditions.length'>
   <span class="not-active" @click="clearCondition">清空已选：<span>
    
   <el-tag
   v-for='(condition, index) in conditions' 
   :key="condition.id"
   type="primary"
   :closable="true"
   size="small"
   :disable-transitions="true"
   @close='removeCondition(condition, index)'
   @click='removeCondition(condition, index)'>
    {{condition.name}}
   </el-tag>
  </div>
 </div>

 <script src="./data.js"></script>

 <script>
  // 简单封装一个公用组件
  Vue.component('my-tag', {
   template: "<el-tag v-bind='$attrs' v-on='$listeners' effect='dark' size='small' :disable-transitions='true' @click='clickChild' @close='clickChild'><slot></slot></el-tag>",

   methods: {
    clickChild() {
     this.$emit("click-child")
    }
   }
  });

  var app = new Vue({
   el: '#app',
   data() {
    return {
     categories, // 分类标签，可从外部加载配置
     conditions: [] // 已选条件
    }
   },

   watch: {
    // 监听条件变化，按照请求接口拼装请求参数
    conditions(val){
     let selectedCondition = {};

     for(let categorie of this.categories){
      let selected_list = [];
      for(let child of categorie.children){
       if(child.active){
        selected_list.push(child.name);
       }
      }
      selectedCondition[categorie.name] = selected_list.join("|")
     }
     console.log(selectedCondition);
    }
   },

   methods: {
    // 处理标签点击事件，未选中则选中，已选中则取消选中
    clickChild(category, categoryIndex, child, childIndex) {
     let uid = `${categoryIndex}-${childIndex}`
     child.uid = uid;
     console.log(uid)
     
     // 取消选择
     if (child.active === true) {
      category.count--;
      child.active = false;
      this.conditions.forEach((conditionChild, index) => {
       if (conditionChild.uid === child.uid) {
        this.conditions.splice(index, 1);
       }
      });
     // 选择
     } else {
      category.count++;
      child.active = true;
      this.conditions.push(child);
     }
    },
   
    // 清除已选整个类别标签
    clearCategory(category, categoryIndex) {
     category.count = 0;
     
     // 可选列表均为未选中状态
     category.children.forEach(child => {
      child.active = false;
     })

     // 清空该类已选元素
     for (let index = this.conditions.length - 1; index >= 0; index--) {
      const conditionChild = this.conditions[index];
      if (conditionChild.uid.startsWith(categoryIndex)) {
       this.conditions.splice(index, 1);
      }
     }
    },
    
    // 移除一个条件
    removeCondition(condition, index) {
     let categoryIndex = condition.uid.split("-")[0];
     this.categories[categoryIndex].count --;

     this.conditions.splice(index, 1)
     condition.active = false;
    },

    // 清空所有条件
    clearCondition() {
     for(let i = this.conditions.length-1; i >=0 ; i--){
      this.removeCondition(this.conditions[i], i);
     }
    }
   }
  });
 </script>

</body>

</html>

标签筛选的数据格式

data.js

复制代码

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
var categories = [{
 name: '品牌',
 count: 0,
 children: [{
  name: '联想',
 }, {
  name: '小米',

 }, {
  name: '苹果',

 }, {
  name: '东芝',

 }]
}, {
 name: 'CPU',
 count: 0,
 children: [{
  name: 'intel i7 8700K',

 }, {
  name: 'intel i7 7700K',

 }, {
  name: 'intel i9 9270K',

 }, {
  name: 'intel i7 8700',

 }, {
  name: 'AMD 1600X',


 }]
}, {
 name: '内存',
 count: 0,
 children: [{
  name: '七彩虹8G',

 }, {
  name: '七彩虹16G',

 }, {
  name: '金士顿8G',

 }, {
  name: '金士顿16G',

 }]
}, {
 name: '显卡',
 count: 0,
 children: [{
  name: 'NVIDIA 1060 8G',

 }, {
  name: 'NVIDIA 1080Ti 16G',

 }, {
  name: 'NVIDIA 1080 8G',

 }, {
  name: 'NVIDIA 1060Ti 16G',

 }]
}]