封装一个vue3 Toast组件，支持组件和api调用

先来看一段代码

components/toast/index.vue

<template><div v-if="isShow" class="toast">{{msg}}</div>
</template><script setup>
import { ref, watch } from 'vue'
const props = defineProps({show: {type: Boolean,default: false},msg: {type: String,default: 'message',},duration: {type: Number,default: 1500}
})const isShow = ref(props.show)
const emit = defineEmits(['update:show'])watch(() => props.show, (newVal, oldVal) => {isShow.value = newValif (newVal) {clearInterval(timer)var timer = setTimeout(() => {isShow.value = falseemit('update:show', false)}, props.duration)}
})
</script><style scoped>.toast {position: fixed;top: 200px;left: 50%;transform: translateX(-50%);padding: 4px 8px;background-color: rgba(0, 0, 0, .8);border-radius: 4px;color: #fff;}
</style>

这就是一个普通的Toast组件

show：是否显示
msg：弹窗内容
duration：多少毫秒后自动关闭

调用组件

views/toast.view

<template><Toast v-model:show="isShow" msg="hello toast" :duration="2000"></Toast><button @click="isShow = true">组件调用</button>
</template><script setup>import { ref } from 'vue'import Toast from '@/components/toast/index.vue'const isShow = ref(false)
</script>

我们平时都是这么用的

但是这个组件只能在.vue组件中使用，现在我的项目中正在封装一个全局axios拦截器request.js，就没办法这么用了。

封装api

在components/toast目录下，与index.vue同级，再新建一个index.js文件，写入以下代码：

import { createApp } from 'vue'
import Toast from './index.vue'const showToast = (msg, options = { duration: 1500 }) => {const { duration } = optionsconst div = document.createElement('div')const componentInstance = createApp(Toast, {show: true,msg,duration})componentInstance.mount(div)document.body.appendChild(div)let timer = nullclearTimeout(timer)timer = setTimeout(() => {componentInstance.unmount(div); document.body.removeChild(div);}, duration)
}export default showToast