只在指定的 Vue 组件中加载外部 JS 文件

## 解决过程

- Google 关键字：`vue-cli load external js condition`
- 解决方案：[How to add external JS scripts to VueJS Components?](https://stackoverflow.com/a/60345422/2667665)

关键代码：

```html
<template>
  <div>
    This is my component
    <script type="application/javascript" defer src="..."></script>
  </div>
<template>
```
