vue3 teleport的使用案例详解

OStack程序员社区-中国程序员成长平台 › 门户 › 编程› JavaScript›JavaScript编程经验

原作者: [db:作者] 来自: [db:来源] 收藏邀请

官网

https://cli.vuejs.org/zh/guide/

有时组件模板的一部分逻辑上属于该组件，而从技术角度来看，最好将模板的这一部分移动到 DOM 中 Vue app 之外的其他位置。

案例

这两个组件都是在父元素里的，是父组件的子级，但是从技术角度来看，他们是应该是挂载在body下面的

未修改版

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Vue3</title>
  <script src="./vue.js"></script>
</head>
<body>
<div id="hello-vue" class="box">
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <button @click="handleClick">点我显示子组件</button>
  <cpn ref="compRef" @show-confirm="showConfirm"></cpn>
  <confirm ref="confirmRef" @confirm="handleConfirm" @cancel="handleCancel" text="确定退出吗"></confirm>
</div>
<!--点击按钮后显示的那个组件-->
<template id="mycpn">
  <transition name="list-fade">
    <div class="cpnContainer" v-show="isshow" @click.stop="handleClose()">
      <div class="inner-wrapper" @click.stop>
        用到了transition
        <div class="text">
          <div>我是inner-text</div>
          <div>我是inner-text</div>
          <div>我是inner-text</div>
          <div>我是inner-text</div>
          <div>我是inner-text</div>
        </div>
        <div class="close" @click="handleClose()">close</div>
      </div>
    </div>
  </transition>

</template>

<!--确认关闭confirm组件-->
<template id="confirm">
  <transition name="confirm-fade">
    <div v-show="isshow" class="confirm">
      <div class="confirm-wrapper">
        <div class="confirm-content">
          <p>{{text}}</p>
          <div class="btnContainer">
            <button style="background-color: darkseagreen;margin-right: 40px" @click="confirm">{{confirmBtnText}}</button>
            <button @click="cancel">{{cancelBtnText}}</button>
          </div>
        </div>
      </div>
    </div>
  </transition>
</template>
<script>
  const cpn = {
    template: "#mycpn",
    props: {},
    data() {
      return {
        // bbb: 145612
        isshow: false
      }
    },
    methods: {
      show() {
        this.isshow = true
      },
      hide() {
        // console.log("hide")
        this.isshow = false
      },
      handleClose() {
        // console.log("hide")
        this.$emit("show-confirm")
      },

    }
  }

  const confirm = {
    template: "#confirm",
    props: {
      text: {
        type: String,
        default: 'fdsafdasfdas'
      },
      confirmBtnText: {
        type: String,
        default: '确定'
      },
      cancelBtnText: {
        type: String,
        default: '取消'
      }
    },
    data() {
      return {
        // bbb: 145612
        isshow: false
      }
    },
    methods: {
      show() {
        this.isshow = true
      },
      hide() {
        this.isshow = false
        // 控制子组件的显示
      },
      // 点击按钮后向父组件派发事件
      confirm() {
        this.hide();
        this.$emit("confirm")
      },
      cancel() {
        this.hide()
        this.$emit('cancel')
      }
    }
  }
  const HelloVueApp = Vue.createApp({
    data() {
      return {
        message: 'Hello Vue!!'
      }
    },
    components: {
      cpn,
      confirm
    },
    methods: {
      handleClick() {
        // 父组件调用子组件的方法
        // this.$refs.compRef.show()
        this.$refs.compRef.show()
      },
      showConfirm() {
        console.log("fdsa")
        this.$refs.confirmRef.show()
      },
      // 点击取消或确定以后的逻辑
      handleConfirm() {
        this.$refs.compRef.hide()
      },
      handleCancel() {

      }
    }
  }).mount("#hello-vue")

</script>
</body>
<style>
    * {
        font-size: 50px;
    }

    /*vue内置transition*/
    .list-fade-enter-active, .list-fade-leave-active {
        transition: opacity .3s;
    }

    .list-fade-enter-active .inner-wrapper, .list-fade-leave-active .inner-wrapper {
        transition: all .3s;
    }

    .list-fade-enter-from, .list-fade-leave-to {
        opacity: 0;
    }

    .list-fade-enter-from .inner-wrapper, .list-fade-leave-to .inner-wrapper {
        transform: translate3d(0, 100%, 0);
    }


    /*子组件样式*/
    .cpnContainer {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, .3);
    }

    .inner-wrapper {
        padding: 70px;
        background-color: darkcyan;
        position: fixed;
        bottom: 0;
        width: 100%;
        box-sizing: border-box;
    }

    .close {
        position: absolute;
        top: 50px;
        right: 50px;
    }

    /*confirm组件样式*/
    .confirm {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: rgba(0, 0, 0, 0.14);
    }

    .btnContainer {
        padding: 0 70px;
    }
    .confirm-wrapper{
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 999;
        box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);
    }
    .confirm-content{
        overflow: hidden;
        width: 600px;
        border-radius: 13px;
        background: white
    }
    .confirm-content p {
        display: block;
        padding-left: 40px;
    }

    /*.confirm-content {*/
    /*    border-radius: 8px;*/
    /*    box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);*/
    /*    position: absolute;*/
    /*    top: 50%;*/
    /*    left: 50%;*/
    /*    transform: translate(-50%, -50%);*/
    /*    !*p标签的margin top影响到了父元素 bfc*!*/
    /*    !*overflow: hidden;*!*/
    /*    background-color: white;*/
    /*}*/

    .confirm-content button {
        border: 1px solid cornflowerblue;
        background-color: transparent;
        padding: 25px 50px;
        margin-bottom: 30px;
        border-radius: 5px;
    }
    .confirm-fade-enter-active ,.confirm-fade-leave-active{
        transition: all .3s;
    }
    .confirm-fade-enter-from ,.confirm-fade-leave-to{
        opacity: 0;
    }
    .confirm-fade-enter-active .confirm-content {
        animation: confirm-zoom-in .3s;
        transform-origin: center;
    }
    .confirm-fade-leave-active .confirm-content {
        animation: confirm-zoom-out .3s;
        transform-origin: center;
    }

    @keyframes confirm-zoom-in {
        0% {

            transform: scale(0);
        }
        60% {
            transform: scale(1.1);
        }
        100% {
            transform: scale(1);
        }
    }
    @keyframes confirm-zoom-out {
        0% {
            transform: scale(1);
        }
        30% {
            transform: scale(0.4);
        }
        100% {
            transform: scale(0);
        }
    }

</style>
</html>

布局

修改版

布局

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>Vue3</title>
  <script src="./vue.js"></script>
</head>
<body>
<div id="hello-vue" class="box">
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <div>我是父组件</div>
  <button @click="handleClick">点我显示子组件</button>
  <cpn ref="compRef" @show-confirm="showConfirm"></cpn>
  <confirm ref="confirmRef" @confirm="handleConfirm" @cancel="handleCancel" text="确定退出吗"></confirm>
</div>
<!--点击按钮后显示的那个组件-->
<template id="mycpn">
  <teleport to="body">
    <transition name="list-fade">
      <div class="cpnContainer" v-show="isshow" @click.stop="handleClose()">
        <div class="inner-wrapper" @click.stop>
          用到了transition
          <div class="text">
            <div>我是inner-text</div>
            <div>我是inner-text</div>
            <div>我是inner-text</div>
            <div>我是inner-text</div>
            <div>我是inner-text</div>
          </div>
          <div class="close" @click="handleClose()">close</div>
        </div>
      </div>
    </transition>
  </teleport>


</template>

<!--确认关闭confirm组件-->
<template id="confirm">
  <teleport to="body">
    <transition name="confirm-fade">
      <div v-show="isshow" class="confirm">
        <div class="confirm-wrapper">
          <div class="confirm-content">
            <p>{{text}}</p>
            <div class="btnContainer">
              <button style="background-color: darkseagreen;margin-right: 40px" @click="confirm">{{confirmBtnText}}</button>
              <button @click="cancel">{{cancelBtnText}}</button>
            </div>
          </div>
        </div>
      </div>
    </transition>
  </teleport>

</template>
<script>
  const cpn = {
    template: "#mycpn",
    props: {},
    data() {
      return {
        // bbb: 145612
        isshow: false
      }
    },
    methods: {
      show() {
        this.isshow = true
      },
      hide() {
        // console.log("hide")
        this.isshow = false
      },
      handleClose() {
        // console.log("hide")
        this.$emit("show-confirm")
      },

    }
  }

  const confirm = {
    template: "#confirm",
    props: {
      text: {
        type: String,
        default: 'fdsafdasfdas'
      },
      confirmBtnText: {
        type: String,
        default: '确定'
      },
      cancelBtnText: {
        type: String,
        default: '取消'
      }
    },
    data() {
      return {
        // bbb: 145612
        isshow: false
      }
    },
    methods: {
      show() {
        this.isshow = true
      },
      hide() {
        this.isshow = false
        // 控制子组件的显示
      },
      // 点击按钮后向父组件派发事件
      confirm() {
        this.hide();
        this.$emit("confirm")
      },
      cancel() {
        this.hide()
        this.$emit('cancel')
      }
    }
  }
  const HelloVueApp = Vue.createApp({
    data() {
      return {
        message: 'Hello Vue!!'
      }
    },
    components: {
      cpn,
      confirm
    },
    methods: {
      handleClick() {
        // 父组件调用子组件的方法
        // this.$refs.compRef.show()
        this.$refs.compRef.show()
      },
      showConfirm() {
        console.log("fdsa")
        this.$refs.confirmRef.show()
      },
      // 点击取消或确定以后的逻辑
      handleConfirm() {
        this.$refs.compRef.hide()
      },
      handleCancel() {

      }
    }
  }).mount("#hello-vue")

</script>
</body>
<style>
    * {
        font-size: 50px;
    }

    /*vue内置transition*/
    .list-fade-enter-active, .list-fade-leave-active {
        transition: opacity .3s;
    }

    .list-fade-enter-active .inner-wrapper, .list-fade-leave-active .inner-wrapper {
        transition: all .3s;
    }

    .list-fade-enter-from, .list-fade-leave-to {
        opacity: 0;
    }

    .list-fade-enter-from .inner-wrapper, .list-fade-leave-to .inner-wrapper {
        transform: translate3d(0, 100%, 0);
    }


    /*子组件样式*/
    .cpnContainer {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background: rgba(0, 0, 0, .3);
    }

    .inner-wrapper {
        padding: 70px;
        background-color: darkcyan;
        position: fixed;
        bottom: 0;
        width: 100%;
        box-sizing: border-box;
    }

    .close {
        position: absolute;
        top: 50px;
        right: 50px;
    }

    /*confirm组件样式*/
    .confirm {
        position: fixed;
        top: 0;
        bottom: 0;
        left: 0;
        right: 0;
        background-color: rgba(0, 0, 0, 0.14);
    }

    .btnContainer {
        padding: 0 70px;
    }
    .confirm-wrapper{
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 999;
        box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);
    }
    .confirm-content{
        overflow: hidden;
        width: 600px;
        border-radius: 13px;
        background: white
    }
    .confirm-content p {
        display: block;
        padding-left: 40px;
    }

    /*.confirm-content {*/
    /*    border-radius: 8px;*/
    /*    box-shadow: 0px 0px 80px 3px rgba(0, 0, 0, 0.2);*/
    /*    position: absolute;*/
    /*    top: 50%;*/
    /*    left: 50%;*/
    /*    transform: translate(-50%, -50%);*/
    /*    !*p标签的margin top影响到了父元素 bfc*!*/
    /*    !*overflow: hidden;*!*/
    /*    background-color: white;*/
    /*}*/

    .confirm-content button {
        border: 1px solid cornflowerblue;
        background-color: transparent;
        padding: 25px 50px;
        margin-bottom: 30px;
        border-radius: 5px;
    }
    .confirm-fade-enter-active ,.confirm-fade-leave-active{
        transition: all .3s;
    }
    .confirm-fade-enter-from ,.confirm-fade-leave-to{
        opacity: 0;
    }
    .confirm-fade-enter-active .confirm-content {
        animation: confirm-zoom-in .3s;
        transform-origin: center;
    }
    .confirm-fade-leave-active .confirm-content {
        animation: confirm-zoom-out .3s;
        transform-origin: center;
    }

    @keyframes confirm-zoom-in {
        0% {

            transform: scale(0);
        }
        60% {
            transform: scale(1.1);
        }
        100% {
            transform: scale(1);
        }
    }
    @keyframes confirm-zoom-out {
        0% {
            transform: scale(1);
        }
        30% {
            transform: scale(0.4);
        }
        100% {
            transform: scale(0);
        }
    }

</style>
</html>