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<!DOCTYPE html>
<html lang="en">

<head>
    <title>propsData Option</title>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script type="text/javascript" src="../assets/js/vue.js"></script>
</head>

<body>
    <h1>propsData Option</h1>
    <hr>
    <header></header>

    <script type="text/javascript">
        var header_a = Vue.extend({
            template: `<p>{{message}}-{{a}}</p>`,
            data() {
                return {
                    message: "Hello , I am header!"
                }
            },
            props:['a']
        })

        new header_a({propsData:{a:1}}).$mount("header");
    </script>
</body>

</html>

本项目引用的自定义外部资源

vue.js