How to write components by introducing vue.js file separately

How to introduce the vue.js file separately to write components: first introduce the vue.js file; then use the "Vue.component" method to create a card component; and finally make the parent page call the component.

The operating environment of this tutorial: windows7 system, vue2.5.17 version, Dell G3 computer.

Related recommendations: "vue.js Tutorial"

How to write components by introducing vue.js files separately?

1. First introduce the vue.js file

<script src="https://cdn.bootcss.com/vue/2.5.17-beta.0/vue.js"></script>

2, and then use the Vue.component method to create a card component

Vue.component("card",{
    props:{//这里是组件可以接受的参数，也就是相当于面向
           // 原型写组件时的配置参数，用户可以传递不同参数，自己定义组件
        cardTitle:{//卡片标题
            type:String,
            default:'这是一个卡片'
        },
        list:{//列表内容
            type:Array,
            default:[]
        }
    },
    template:`
        <div class="modal">
            <div class="modal-header">
                <h4>{{cardTitle}}</h4>
            </div>
            <div class="modal-content">
                <div>
                    <slot name="modal-content">可以扩展的卡片内容</slot>
                    <ul>
                        <li v-for="(item,index) in list">{{item}}</li>
                    </ul>
                </div>
            </div>
        </div>
    `,
    methods:{//这里定义的组件的方法，利用$emit()进行父子组件通信，子组件通过点击事
             // 件告诉父组件触发一个自定义事件，$emit()方法第二个参数也可以用来传递数据
        okHandle(){
            this.$emit("ok");
        },
        cancelHandle(){
            this.$emit(&#39;cancel&#39;)
        }
    }
});

Use:

Parent page To call this component, the outermost layer must be wrapped by a div element with the instance ID of vue as app.

<div id="app">
    <div>
        <card :list="list" @ok="okMethods" @cancel="cancelMethods"></card>
    </div>
</div>

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