<div id="app">

    <span>这是  :is="show"的案例</span>

    <component :is="show"></component>

    <span>这是  is="show"的案例</span>

    <component is="show"></component>

</div>

<script>

    Vue.component('one',{

        template: "<div>one<div>"

    })

    Vue.component('show',{

        template: "<div>show<div>"

    })

    var vm = new Vue({

        el: '#app',

        data: {

            show: 'one'

        },

    })

</script>