# 🏅 6/21 (一) 每日任務 Day 41
###### tags: `Vue 直播班 - 2021 夏季班`

題目 (請將答案貼上 CodePen)
---
操作 [這個模板](https://codepen.io/rider159159/pen/gOmBaWj)，執行以下要求 (只能操作 JS 的部分):

> $refs 生命週期陷阱
> - 請試著將模板中的 created 生命週期替換為 mounted，讓 alert 警告能夠跳出。
> - 本次練習主要是讓同學理解 created() 、 mounted() 的使用時機

回報流程
---
請同學依照下圖教學觀看解答、回報答案:


回報格式如下圖，請在「回報區」使用註解回報答案 (為了統計人數，請同學依序加上「報數」)


<!-- 解答

const app = Vue.createApp({
mounted(){
this.$refs.alert.callAlert();
},
})

-->

回報區
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<!--Alpha
Codepen: https://codepen.io/alphatero/pen/xxqeaWG
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Codepen: https://codepen.io/hsuan333/pen/XWMQPPW
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https://codepen.io/yxzzktmb/pen/ZEeZqZe?editors=1010
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codepen: https://codepen.io/nekorice/pen/XWMQyzq
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codepen: https://codepen.io/xtsjrjdv/pen/qBrGEmE
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codepen: https://codepen.io/rockayumitw/pen/poemvVQ?editors=1011
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https://codepen.io/ericadu/pen/QWpeqqV
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https://codepen.io/lumedkle/pen/abWozJK?editors=1010
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https://codepen.io/pohxiqqo/pen/OJmPLNM?editors=1010
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https://codepen.io/ChiangJ/pen/gOWbNYw?editors=1010
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https://codepen.io/twoz/pen/PomZXKJ?editors=1011
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