Vue3全局提示（Message）

可自定义设置以下属性：

• 全局提示自动关闭的延时时长（duration）单位ms，默认为3000ms
• 消息提示距离顶部的位置（top）单位像素px，默认为30px

调用一次只展示一个提示，若调用多次则依次展示多个提示

效果如下图：

info()调用：

success()调用：

error()调用：

warn()调用：

①创建全局提示组件Message：

<template>
  <div class="m-message-wrap" :style="`top: ${top}px;`">
    <div class="m-message" v-for="(content, index) in messageContent" :key="index">
      <transition name="slide-fade" :key="index">
        <div class="m-message-content" @mouseenter="onEnter(index)" @mouseleave="onLeave(index)" v-if="showMessage[index]">
          <svg class="svg" v-if="mode==='info'" :style="{fill: colorStyle[mode] }" viewBox="64 64 896 896" data-icon="info-circle" aria-hidden="true" focusable="false"><path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm32 664c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V456c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272zm-32-344a48.01 48.01 0 0 1 0-96 48.01 48.01 0 0 1 0 96z"></path></svg>
          <svg class="svg" v-if="mode==='success'" :style="{fill: colorStyle[mode] }" viewBox="64 64 896 896" data-icon="check-circle" aria-hidden="true" focusable="false"><path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm193.5 301.7l-210.6 292a31.8 31.8 0 0 1-51.7 0L318.5 484.9c-3.8-5.3 0-12.7 6.5-12.7h46.9c10.2 0 19.9 4.9 25.9 13.3l71.2 98.8 157.2-218c6-8.3 15.6-13.3 25.9-13.3H699c6.5 0 10.3 7.4 6.5 12.7z"></path></svg>
          <svg class="svg" v-if="mode==='error'" :style="{fill: colorStyle[mode] }" viewBox="64 64 896 896" data-icon="close-circle" aria-hidden="true" focusable="false"><path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm165.4 618.2l-66-.3L512 563.4l-99.3 118.4-66.1.3c-4.4 0-8-3.5-8-8 0-1.9.7-3.7 1.9-5.2l130.1-155L340.5 359a8.32 8.32 0 0 1-1.9-5.2c0-4.4 3.6-8 8-8l66.1.3L512 464.6l99.3-118.4 66-.3c4.4 0 8 3.5 8 8 0 1.9-.7 3.7-1.9 5.2L553.5 514l130 155c1.2 1.5 1.9 3.3 1.9 5.2 0 4.4-3.6 8-8 8z"></path></svg>
          <svg class="svg" v-if="mode==='warn'" :style="{fill: colorStyle[mode] }" viewBox="64 64 896 896" data-icon="exclamation-circle" aria-hidden="true" focusable="false"><path d="M512 64C264.6 64 64 264.6 64 512s200.6 448 448 448 448-200.6 448-448S759.4 64 512 64zm-32 232c0-4.4 3.6-8 8-8h48c4.4 0 8 3.6 8 8v272c0 4.4-3.6 8-8 8h-48c-4.4 0-8-3.6-8-8V296zm32 440a48.01 48.01 0 0 1 0-96 48.01 48.01 0 0 1 0 96z"></path></svg>
          <p class="content">{{ content }}</p>
        </div>
      </transition>
    </div>
  </div>
</template>
<script>
export default {
  name: 'Message',
  props: {
    duration: { // 自动关闭的延时,单位ms
      type: Number,
      default: 3000
    },
    top: { // 消息距离顶部的位置，单位px
      type: Number,
      default: 30
    }
  },
  data () {
    return {
      colorStyle: { // 颜色主题对象
        info: '#1890FF',
        success: '#52c41a',
        error: '#f5222d',
        warn: '#faad14'
      },
      mode: 'info',
      resetTimer: null,
      showMessage: [],
      hideTimers: [],
      messageContent: []
    }
  },
  computed: {
    clear () { // 所有提示是否已经全部变为false
      return this.showMessage.every(item => !item)
    }
  },
  watch: {
    clear (to, from) { // 所有提示都消失后重置
      if (!from && to) {
        this.resetTimer = setTimeout(() => {
          this.messageContent.splice(0)
          this.showMessage.splice(0)
        }, 500)
      }
    }
  },
  methods: {
    onEnter (index) {
      clearTimeout(this.hideTimers[index])
    },
    onLeave (index) {
      this.onHideMessage(index)
    },
    show (content) {
      clearTimeout(this.resetTimer)
      this.messageContent.push(content)
      const index = this.messageContent.length - 1
      console.log('index:', index)
      this.$nextTick(() => { // 待异步更新队列之后显示提示框，否则过渡效果会异常
        this.$set(this.showMessage, index, true)
        this.onHideMessage(index)
      })
    },
    info (content) {
      this.mode = 'info'
      this.show(content)
    },
    success (content) {
      this.mode = 'success'
      this.show(content)
    },
    error (content) {
      this.mode = 'error'
      this.show(content)
    },
    warn (content) {
      this.mode = 'warn'
      this.show(content)
    },
    onHideMessage (index) {
      this.hideTimers[index] = setTimeout(() => {
        this.$set(this.showMessage, index, false)
      }, this.duration)
    }
  }
}
</script>
<style lang="less" scoped>
// 渐变过渡效果
.fade-enter-active, .fade-leave-active {
  transition: opacity .3s;
}
.fade-enter, .fade-leave-to {
  opacity: 0;
}
// 滑动渐变过渡效果
.slide-fade-enter-active {
  transition: all .5s ease;
}
.slide-fade-leave-active {
  transition: all .5s ease;
}
.slide-fade-enter, .slide-fade-leave-to {
  transform: translateY(-16px);
  -ms-transform: translateY(-16px); /* IE 9 */
  -webkit-transform: translateY(-16px); /* Safari and Chrome */
  opacity: 0;
}
.m-message-wrap {
  position: fixed;
  z-index: 999; // 突出显示该层级
  width: 100vw;
  left: 0;
  right: 0;
  pointer-events: none; // 保证整个message区域不遮挡背后元素响应鼠标事件
  .m-message {
    text-align: center;
    .m-message-content {
      margin: 8px 0;
      display: inline-block;
      padding: 10px 16px;
      background: #FFF;
      border-radius: 4px;
      box-shadow: 0 4px 12px rgba(0,0,0,.15);
      pointer-events: auto; // 保证内容区域部分可以正常响应鼠标事件
      .svg {
        width: 16px;
        height: 16px;
        margin-right: 8px;
        position: relative;
        top: 2px;
      }
      .content {
        display: inline-block;
        font-size: 14px;
        color: rgba(0,0,0,.65);
        line-height: 20px;
      }
    }
  }
}
</style>

②在要使用的页面引入：

<div class="m-tag yellow" @click="onShowMessage('This is a normal message')">哥斯拉</div>
<Message ref="message" :duration="3000" :top="30" />
import Message from './Message'
components: {
	Message
},
onShowMessage (content) {
      this.$refs.message.info(content) // info调用
      // this.$refs.message.success(content) // success调用
      // this.$refs.message.error(content) // error调用
      // this.$refs.message.warn(content) // warning调用
}
.m-tag {
  margin-top: 120px;
  display: inline-block;
  padding: 6px 12px;
  border-radius: 15px;
  height: 20px;
  font-size: 14px;
  font-weight: 400;
  line-height: 20px;
  cursor: pointer;
}
.yellow {
  color: #FF9000;
  background: #FFF9F0;
}