我正在try 根据布尔值切换字体可怕图标，但似乎绘制后字体可怕图标仍保留在屏幕上:
https://jsfiddle.net/50wL7mdz/200312/
HTML:
<script src="https://unpkg.com/vue"></script>
<script defer src="https://use.fontawesome.com/releases/v5.0.8/js/all.js" integrity="sha384-SlE991lGASHoBfWbelyBPLsUlwY1GwNDJo3jSJO04KZ33K2bwfV9YBauFfnzvynJ" crossorigin="anonymous"></script>

<div id="app">
<input v-model="marked" type="checkbox"/>
<i v-if="marked" class="far fa-check-square"></i>
</div>
JS:
new Vue({
el: '#app',
data: {
marked: false
}
})
是我做错了什么，还是字体或vue中有错误.js？