// Toast.vue
<template>
<div id="toast" :class="[isActive ? 'active' : '', type]">
{{ message }}
</div>
</template>

<script>
export default {
name: "Toast",
data() {
return {
message: "",//传递的消息
isActive: false,//是否处于活跃状态（显示在页面内）
type: "",//消息样式
timer1: null,
timer2: null,
};
},
mounted() {
this.$nextTick(() => {
this.isActive = true;
});
this.timer1 = setTimeout(() => {
this.isActive = false;
}, this.delayer);
this.timer2 = setTimeout(() => {
this.$destroy(true);//销毁vue实例
}, this.delayer * 2);
},
destroyed() {
this.$el.parentNode.removeChild(this.$el);//移除dom元素
clearTimeout(this.timer1);
clearTimeout(this.timer2);
},
};
</script>

<style scoped>
#toast {
position: fixed;
top: -50px;
left: 50%;
transform: translate(-50%, 0);
padding: 13px 20px;
border-radius: 15px;
z-index: 999;
opacity: 0;
transition: all 1s;
}
#toast.success {
background-color: #f0f9eb;
color: #67c23a;
}
#toast.error {
background-color: #fef0f0;
color: #f56c6c;
}
#toast.active {
top: 30px;
opacity: 1;
}
</style>

// index.js
import Toast from "./Toast.vue";
const obj = {};
obj.install = function(Vue) {

//1. 创建组件构造器
const toastContrustor = Vue.extend(Toast);

Vue.prototype.$toast = function(message, type, delayer = 3000) {

//2. new的方式，根据组件构造器，可以创建出来一个组件对象
const toast = new toastContrustor();

Object.assign(toast, { message, type, delayer });

//3. 将组件对象手动的挂载到一个元素上面

toast.$mount(document.createElement("div"));

//4. toast.$el对应的就是div
document.body.appendChild(toast.$el);
};
};

export default obj;

//main.js
import toast from "components/common/toast";

Vue.use(toast);

this.$toast("hi,i am spiderman", "success", 5000);

this.$toast("hi,i am spiderman", "error", 5000);