补充

全局单例公共组件

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message
- index.ts
- Message.vue

index.ts

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import Message from "./Message.vue";

export type MessageType = "default" | "success" | "error" | "warning";

export interface MessageOptions {
  type?: MessageType;
  time?: number;
  callback?: () => void;
}

//  单例模式
let vm;

const install = (Vue) => {
  let Component = Vue.extend(Message);

  Vue.prototype.$message = (
    content: String,
    options?: MessageType | MessageOptions
  ) => {
    let data = {
      content,
    };

    if (vm) {
      // 全局只保持一个 Message 公共组件
      vm.$destroy();
    }

    if (typeof options === "string") {
      data["type"] = options;
    } else {
      Object.assign(data, options);
    }

    let instance = new Component({
      data,
    });

    vm = instance.$mount();
    vm.show = true;

    vm.$on("destroyed", () => {
      vm = null;
    });

    return vm;
  };
};

export default {
  install,
  Message,
};

Message.vue

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<template>
  <transition name="slide" @after-leave="afterLeave">
    <div v-if="show" :class="component_class" @click="show = false">
      {{ content }}
    </div>
  </transition>
</template>

<style lang="less" scoped>
  .message {
    position: fixed;
    bottom: 60px;
    left: 50%;
    font-size: 14px;
    color: #333;
    padding: 5px 10px;
    text-align: center;
    overflow: hidden;
    opacity: 0.9;
    border-radius: 4px;
    min-width: 60px;
    max-width: 60%;
    word-break: break-all;
    box-shadow: 1px 1px 2px 1px rgba(0, 0, 0, 0.16);
    transform: translate(-50%, 0);
    z-index: 10001;

    &.default {
      color: #fff;
      background-color: #333;
    }

    &.success {
      color: #fff;
      background-color: @success;
    }

    &.warning {
      color: #fff;
      background-color: @warning;
    }

    &.error {
      color: #fff;
      background-color: @error;
    }
  }

  .slide-enter-active,
  .slide-leave-active {
    transition: all 0.3s;
  }
  .slide-enter,
  .slide-leave-to {
    transform: translate(-50%, 10px);
    opacity: 0;
  }
</style>

<script lang="ts">
  import { Vue, Component } from "vue-property-decorator";

  @Component({})
  export default class Toast extends Vue {
    show = false;
    content = "";
    time = 2000;
    type = "default";
    callback = null;

    get component_class() {
      return ["message", `${this.type}`];
    }

    mounted() {
      document.body.appendChild(this.$el);
      this.time && setTimeout(this.close, this.time);
    }

    beforeDestroy() {
      document.body.removeChild(this.$el);
      this.callback &&
        this.$nextTick(() => {
          this.callback();
        });
    }

    destroyed() {
      this.$emit("destroyed");
    }

    close() {
      this.show = false;
    }

    afterLeave() {
      this.$destroy();
    }
  }
</script>