[S06E02][新手村] Component Part 1

[Kevin]

https://youtu.be/ielZaY4a_Jc

參考資料

• https://developer.mozilla.org/zh-TW/docs/Web/API/Event
• https://developer.mozilla.org/en-US/docs/Web/JavaScript/New_in_JavaScript/ECMAScript_2015_support_in_Mozilla
• https://developer.mozilla.org/zh-TW/docs/Web/API/Event/bubbles
• https://blog.techbridge.cc/2017/07/15/javascript-event-propagation/