效果圖：

效果圖

放代碼：

組件文件路徑：components/message/index.vue

<template>
  <!-- 全局提示框 -->
  <div class="fixed-message" v-show="visible">
     <div v-show="visible && type === 'success'" class="success">{{txt}}</div>
     <div v-show="visible && type === 'fail'" class="fail">{{txt}}</div>
     <div v-show="visible && type === 'warning'" class="warning">{{txt}}</div>
  </div>
</template>

<script>
    export default {
        data() {
            return {
                visible: false,
                txt: "",
                type: "",
            }
        }
    }
</script>

<style lang="scss" scoped>
    .fixed-message {
        position: fixed;
        top: 0;
        left: 0;
        z-index: 99999;
        width: 100%;
        height: 1.2rem;

        >div {
            width: 100%;
            height: 100%;
            color: #FFF;
            text-align: center;
            line-height: 1.2rem;
            position: relative;
            top: 0rem;
            animation: message 0.5s ease-in-out;
        }
    }
    
    @keyframes message {
        0% {
            top: -1.2rem;
        }
        100% {
            top: 0rem;
        }
    }

    .success {
        background: #07c160;
    }

    .fail {
        background: #ee0a24;
    }

    .warning {
        background: #ff976a;
    }
</style>

組件文件路徑：components/message/message.js

import MessageComponent from './index.vue';

const Message = {};

Message.install = function (Vue) {
    const MessageConstructor = Vue.extend(MessageComponent);
    const instance = new MessageConstructor();

    instance.$mount(document.createElement('div'));
    document.body.appendChild(instance.$el);
  
    let timer;
  
    const MsgMain = {
        show_message(txt, type) {
            clearInterval(timer);
            timer = setTimeout(() => {
                instance.visible = false;
            }, 1500);
            instance.txt = txt;
            instance.type = type;
            instance.visible = true;
        },
        success(txt, type = 'success') {
            this.show_message(txt, type);
        },
        fail(txt, type = 'fail') {
            this.show_message(txt, type);
        },
        warning(txt, type = 'warning') {
            this.show_message(txt, type);
        }
    }

    Vue.prototype.$message = MsgMain;
};

export default Message;

main文件路徑：main.js

import message from './components/Message/message';

Vue.use(message); // 全局提示框

調(diào)用組件文件路徑：index.vue

<template>
    <div class="mages">
        <button class="btn success" @click="handSuccess()">success</button>
        <button class="btn fail" @click="handFail()">fail</button>
        <button class="btn warning" @click="handWarning()">warning</button>
    </div>
</template>

<script>
    export default {
        methods: {
            handSuccess() {
                this.$message.success('I am success ~~~');
            },
            handFail() {
                this.$message.fail('I am fail ~~~');
            },
            handWarning() {
                this.$message.warning('I am warning ~~~');
            },
        }
    }
</script>

<style lang="scss" scoped>
    .mages {
        overflow-y: scroll;
    }
    
    .btn {
        width: 90%;
        margin-left: 5%;
        margin-top: 0.5rem;
        height: 1.2rem;
        font-size: 0.4rem;
        color: #FFF;
        border-radius: 1rem;
        background: rgb(126, 154, 245);
    }

    .btn:nth-child(1) {
        margin-top: 8rem;
    }

    .success {
        background: #07c160;
    }

    .fail {
        background: #ee0a24;
    }

    .warning {
        background: #ff976a;
    }
</style>