使用一个空Vue实例来进行传值,通过$emit,$on即可。

<!DOCTYPE html>
<html lang="zh-CN">
    <head>
        <title></title>
        <meta charset="utf-8">
        <script src="./main/vue.js"></script>
    </head>
    <body>
        <div id="demo">
            <!-- test code -->
            <custom-a></custom-a>
            <custom-b></custom-b>
            <!-- test code -->
        </div>
    </body>
    <script type="text/javascript">
    let bus = new Vue();
    Vue.component("custom-a", {
        template: '<button @click="transValue">Click</button>',
        methods: {
            transValue: () => bus.$emit("transValue", "hello from a")
        }
    });
    Vue.component("custom-b", {
        template: '<input :value="msg">',
        data: function() {
            return {
                msg: ""
            }
        },
        mounted() {
            bus.$on("transValue", msg => this.msg = msg)
        }
    });
    new Vue({
        el: "#demo"
    });
    </script>
</html>
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