Vue.js组件实现选项卡以及切换特效

时间：2021-03-25 09:20:49|栏目：vue|点击：次

Vue.js组件实现选项卡以及切换动画特效，供大家参考，具体内容如下

最近在学习Vue，当看梁灏大神写的《Vue.js实战》时看到了关于用组件实现选项卡功能，我也根据课后的练习加上自己的理解重新编写了一下。

组件分为pane.js和tabs.js两个部分，话不多说，直接上代码。

<!DOCTYPE html>
<html lang="en">

<head>
 <meta charset="UTF-8">
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <meta http-equiv="X-UA-Compatible" content="ie=edge">
 <link rel="stylesheet" href="style.css" rel="external nofollow" >
 <title>Document</title>
</head>

<body>
 <div id="app">
  <tabs v-model="activeKey">
   //transiton是Vue自带封装的，不懂的同学可以去找文档，主要是可以实现动画
   <transition name="slide-fade"> 
    <pane label="标签一" name="1">
     标签一的内容
    </pane>
   </transition>
   <transition name="slide-fade">
    <pane label=" 标签二" name="2">
     标签二的内容
    </pane>
   </transition>
   <transition name="slide-fade">
    <pane label="标签三" name="3">
     标签三的内容
    </pane>
   </transition>

  </tabs>
 </div>


 <script src="vue/vue.js"></script>
 <script src="pane.js"></script>
 <script src="tabs.js"></script>
 <script src="text.js"></script>
</body>

</html>

//tabs.js
Vue.component('tabs', {
 template: `
 <div class="tabs">
  <div class="tabs-bar">
  <div :class="tabCls(item)" v-for="(item, index) in navList" @click="handleChange(index)">
   {{item.label}}
  </div>
  <button @click="removePane()"> 关闭/打开 </button>
  </div>

  <div class="tabs-content">
    <slot></slot> 
  </div>
 </div>
 `,
 props: {
  value: {
   type: [String, Number],
  },
 },
 data: function () {
  return {
   currentValue: this.value,
   navList: [],
  };
 },
 methods: {
  tabCls: function (item) {
   return [
    'tabs-tab',
    {
     'tabs-tab-active': item.name === this.currentValue,
    },
   ];
  },
  getTabs() {
   return this.$children.filter(function (item) {
    return item.$options.name === 'pane';
   });
  },
  updateNav() {
   this.navList = [];
   var _this = this;

   this.getTabs().forEach(function (pane, index) {
    _this.navList.push({
     label: pane.label,
     name: pane.name || index,
     bool: pane.closable,
    });
    if (!pane.name) pane.name = index;
    if (index === 0) {
     if (!_this.currentValue) {
      _this.currentValue = pane.name || index;
     }
    }
   });
   this.updateStatus();
  },
  updateStatus() {
   var tabs = this.getTabs();
   var _this = this;
   tabs.forEach(function (tab) {
    return (tab.show = tab.name === _this.currentValue);
   });
  },
  handleChange: function (index) {
   var nav = this.navList[index];
   var name = nav.name;

   this.currentValue = name;
   this.$emit('input', name);
   // this.$emit('on-click', name);
  },
  removePane: function () {
   var bool = this.navList[1].bool;
   console.log(bool);
   if (bool) {
    this.navList[1].bool = false;
    this.currentValue = '0';
   }
   if (!bool) {
    this.navList[1].bool = true;
    this.currentValue = '1';
    this.$emit('input', '1');
   }
  },
 },
 watch: {
  value: function (val) {
   this.currentValue = val;
  },
  currentValue: function () {
   console.log('demo');
   this.updateStatus();
  },
 },
});

//pane.js
Vue.component('pane', {
 name: 'pane',
 template: `
 <div class="pane" v-if="show">
  <slot> </slot>
 </div>
 `,
 props: {
  name: {
   type: String
  },
  label: {
   type: String,
   default: ''
  },
  closable: {
   type: Boolean,
   default: true
  }
 },

 data: function () {
  return {
   show: true
  }
 },
 methods: {
  updateNav() {
   this.$parent.updateNav();
  }
 },
 watch: {
  label() {
   this.updateNav();
  }
 },
 mounted() {
  this.updateNav();
 }
})

//style.css
.tabs {
 font-size: 14px;
 color: black;
}

.tabs-bar:after {
 content: '';
 display: block;
 width: 100%;
 height: 1px;
 position: relative;
 background: rgba(78, 81, 128, 0.5);
}

.tabs-tab {
 display: inline-block;
 padding: 4px 16px;
 margin-right: 6px;
 color: rgba(0, 0, 0, 0.6);
 background: rgba(134, 134, 131, 0.137);
 border: 1px solid rgba(154, 214, 248, 0.856);
 cursor: pointer;
 position: relative;
}

.tabs-tab-active {
 background: rgb(252, 251, 251);
 color: rgba(0, 0, 0, 1);
 border-top: 1px solid rgba(154, 214, 248, 0.856);
 border-bottom: 1px solid white;
}

/* .tabs-tab-active:before {
 content: '';
 display: block;
 height: 5px;
 background: grey;
 position: absolute;
 top: 0;
 left: 0;
 right: 0;
} */

.tabs-content {
 position: relative;
 left: 10px;
 top: 30px;
 padding: 8px 0;
}

/* 可以设置不同的进入和离开动画 */
/* 设置持续时间和动画函数 */
.slide-fade-enter-active {
 transition: all 1.3s ease;
}

.slide-fade-leave-active {
 transition: all 1.8s cubic-bezier(1, 0.5, 0.8, 1);
}

.slide-fade-enter,
.slide-fade-leave-to

/* .slide-fade-leave-active for below version 2.1.8 */
 {
 transform: translateY(30px);
 opacity: 0;
}

//text.js
var app = new Vue({
 el: '#app',
 data: {
  activeKey: '1',
 },
})

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