vue封装组件的正确方式-封装类似elementui的组件

最近读了下element的源码，仿照他封装了两种不同的组件。

第一种：通过组件来调用显示的

<template>

<!--src/component/custom/main.vue-->

    <div class = "contine">
        <p class = "title">
            {{title}}
        </p>
        <slot class = "contine" name = "contine">

        </slot>
    </div>
</template>

<script>
export default {
    name:"test-component",
    props:{
        title:{
            type : String,
            default:"组件标题"
        }
    }
}
</script>

<style lang="scss" scoped>
    $black : #333;
    $mainSize : 16px;
    $mainLineHeight:30px;
    $lineCenter:center;
    .extendStyle {
        border-radius:$mainSize;
        box-shadow: 3px 3px 3px 3px #333;
    }
    .contine{
        width:50%;
        height:130px;
        color:$black;
        font-size:$mainSize;
        @extend .extendStyle;
        .title,.contine{
            color:$black;
            font-size:$mainSize;
            text-align:$lineCenter;
            line-height:$mainLineHeight;

        }
    }
</style>

组件说明：只是一个简单的组件 显示一个标题和一段自定义slot内容（仅用作展示）；我想通过以下方式引入

import TestModel from "./testComponent/index";
Vue.use(TestModel);

并且调用方法为：

<test-conponent title = "123">
        <div slot = "contine">
          2222
        </div>
    </test-conponent>

这么做，像不像element？是有点这个意思对吧，但是怎么实现呢，在这先说明下use的作用，其实就是相当于执行他的install方法，明白这个 之后 开始动工，思路：执行他的install方法，声明一个vue组件，组件内容就是上面写的，从而达到全局组件的目的，来看看我的js怎么写的：

import main from "./main";
main.install = (Vue) => {
    Vue.component("test-conponent",main);
}
export default main;

没错就是这么一句，第一种的简单组件就写完了，一次引入 全局通用。

第二种、通过指令调用，比如element的loading组件等

<template>
    <div class = "loading-container" v-show = "show">
        <div class = "loading-mask"></div>
        <div class="loading-content">
            <div class="loading-animate"></div>
            <div class="loading-text">
                {{text}}
            </div>
        </div>
    </div>
</template>

<script>
export default {
    props:{
        show:{
            type:Boolean,
        },
        text:{
            type:String,
            default:"加载中...",
        }
    }
}
</script>

<style>
    .loading-container {
        position: relative;
        text-align: center;
    }
    .loading-mask {
        position:fixed;
        top:0;
        bottom:0;
        left: 0;
        right: 0;
        background-color: rgba(0,0,0,.7);
    }
    .loading-content{
        position:fixed;
        left:50%;
        top:45%;
        z-index:999;
        transform: translate(-50%,-45%);
        text-align:center;
        color:#fff;

    }
    .loading-content .loading-animate{
        display:inline-block;
        width:40px;
        height:40px;
        vertical-align: baseline;
        margin:25px 0 10px;
        vertical-align: middle;
        animation:cricleLoading 1s steps(12,end) infinite;
        background: transparent url("data:image/svg+xml;base64,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") no-repeat;
        background-size: 100%;

    }
    .loading-content .loading-text{
        font-size: 16px;
    }
    @-webkit-keyframes cricleLoading{
        0%{
            transform: rotate3d(0,0,1,0deg);
        }
        100%{
            transform: rotate3d(0,0,1,360deg);
        }
    }
     @keyframes cricleLoading{
        0%{
            transform: rotate3d(0,0,1,0deg);
        }
        100%{
            transform: rotate3d(0,0,1,360deg);
        }
    }
</style>

以上是loading组件的内容，要通过这种方式引入：

import loading from "./toolTip";
Vue.use(loading);

并且通过指令方式调用

this.$loading.show({
        text:"拼命加载中"
      });

有的朋友可能会说了，这怎么可能啊，没有节点怎么放进去？对 没错 确实，没有节点是没办法进去的，但是没有节点就声明节点 对么？

import LoadingComponent from "./loading";
import Vue from "vue";
let instance;
const loadingConstructor = Vue.extend(LoadingComponent); 
instance = new loadingConstructor({
    el:document.createElement("div")
});
instance.show = false;
const loading = {
    show(options = {}){
        instance.show = true;
        document.body.appendChild(instance.$el);
        instance.text = options.text;
        setTimeout(()=>{
            loading.hide();
        },5000)
    },
    hide() {
        instance.show = false;
    }
}
export default {
    install(){
        if(!Vue.loading){
            Vue.$loading = loading;
        }
        Vue.mixin({
            created(){
                this.$loading = Vue.$loading;
            }
        })
    }
}

实际上就是变相的利用install方法 吧loading指令挂到页面中，这样不管在哪里都可以直接用this.$loading调用。

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