---
tags: JS 直播班 - 2022 秋季班
---
# 🏅 Day 23 - innerHTML

請同學依照下方觀念練習，並回答問題。

### innerHTML 觀念複習

1. 透過 innerHTML 可以取得 DOM 元素內的「HTML 內容」

HTML:

    <div class="targetClass">
      <!--  註解、換行、空白也包含在內  -->
      <p>HTML 標籤的內容也被選取</p>
    </div>

JS:

    const targetClass = document.querySelector(".targetClass");
    console.log(targetClass.innerHTML);

結果（以下為 Chrome console 的顯示結果）:

2. 可以透過 innerHTML 替換 DOM 元素內的 HTML，需要注意以下幾個重點：
- 原先的所有內容都會被清空
- 新的內容將被瀏覽器解析成「HTML」，也就是說會保留 HTML 標籤的特性。

HTML:

    <!-- 以下的 p 標籤會被清空 -->
    <div class="targetClass">
      <p>替換這個 p 標籤</p>
    </div>

JS:

    const targetClass = document.querySelector(".targetClass");
    targetClass.innerHTML = "<h3>修改後的內容</h3>";

結果：
（網頁渲染出的畫面）

（修改後的 HTML 結構）


3. innerHTML 可以跟變數混合使用

HTML:

    <div class="targetClass"></div>

JS:

    const targetClass = document.querySelector(".targetClass");
    let score = 100;
    targetClass.innerHTML = `<p>小華的成績為 ${score} 分</p>`

結果：
（網頁渲染出的畫面）

（修改後的 HTML 結構）


問題
---
1. 請練習用 querySelector 取得以下 HTML 程式碼中的元素（`.list`），並運用 innerHTML 使其可以呈現出下方圖片的結構

HTML：

<ul class="list">
  <li>...</li>
</ul>

2. 根據下方 HTML 程式碼，若想使用 JS 在其新增一個使用 h1 標籤包覆，文字內容為「標題」的結構該如何撰寫，請在下方選項中選出可以正確呈現的程式碼

HTML：

    <div class="title"></div>

選項：

    1. document.querySelector(".title").textContent = `<h1>標題</h1>`;
    2. document.querySelector(".title").textContent = `標題`;
    3. document.querySelector(".title").innerHTML = `<h1>標題</h1>`;

## 回報流程

將答案寫在 CodePen 並複製 CodePen 連結貼至底下回報就算完成了喔!
解答位置請參考下圖（需打開程式碼的部分觀看）


<!-- 解答：

1.

const list = document.querySelector(".list");
list.innerHTML = `<li>1</li><li>2</li><li>3</li>`;

2. 3
-->

回報區
---

| Discord | CodePen / 答案 | |
|:--------------------:|:--------------------------------------------------------------------------------:| --- |
| 嗶嗶羊#8042 | [Codepen](https://codepen.io/mazizlte-the-typescripter/pen/JjZXLad?editors=1010) |
| 威0#6919 | [Codepen](https://codepen.io/n0918679182/pen/OJEMGMo?editors=1010) | |
| masterYan#2480 | [Codepen](https://codepen.io/htzwgoqt-the-looper/pen/poKgBqy) | |
| hsiung阿熊#4079 | [Codepen](https://codepen.io/hsiungchi/pen/jOKWRWo) | |
| xherobruce#6824 | [Codepen](https://codepen.io/winwinbruce/pen/QWxyPNR) | |
| VT#0895 | [Codepen](https://codepen.io/vt197/pen/QWxyPER) | |
| KC_8685#9343 | [Codepen](https://codepen.io/cathy7411/pen/MWXKRbw) | |
| yumy#1940 | [CodePen](https://codepen.io/yumy_yamg/pen/MWXKRjY) | |
| AuroraC#6539 | [codepen](https://codepen.io/AuroraC/pen/XWYXQpK?editors=1111) | |
| albee#9121 | [Codepen](https://codepen.io/albee-chang/pen/NWzxmpm?editors=1111) | |
| 薯餅#3581 | [Codepen](https://codepen.io/ColdingPoTaTo/pen/gOKPygd) | |
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| Ayre#0016 | [Codepen](https://codepen.io/yichunlin09/pen/KKeVYyw?editors=1010) | |
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| Eileen#6454 | [codepen](https://codepen.io/Eileen-io/pen/eYKJoVd) | |
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| Yiru#0236 | [Codepen](https://codepen.io/yiru94/pen/qBKbwPP?editors=1010) | |
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|Lucie#3831|[Codepen](https://codepen.io/bisespei/pen/rNKeQxZ)|
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