197 lines
		
	
	
		
			5.8 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
			
		
		
	
	
			197 lines
		
	
	
		
			5.8 KiB
		
	
	
	
		
			Markdown
		
	
	
	
	
	
| ---
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| id: bad88fee1348ce8acef08815
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| title: 使用 Bootstrap Grid 並排放置元素
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| challengeType: 0
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| forumTopicId: 18371
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| dashedName: use-the-bootstrap-grid-to-put-elements-side-by-side
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| ---
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| 
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| # --description--
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| 
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| Bootstrap 具有一套 12 列的響應式柵格系統,可以輕鬆的將多個元素放入一行並指定它們的相對寬度。 Bootstrap 的大部分 class 屬性都可以應用在 `div` 元素上。
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| 
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| Bootstrap 的列寬取決於用戶的屏幕寬度。 比如,手機有着窄屏幕而筆記本電腦有者更大的屏幕.
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| 
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| 就拿 Bootstrap 的 `col-md-*` class 來說。 在這裏, `md` 表示 medium (中等的), 而 `*` 是一個數字,說明了這個元素佔有多少個列寬度。 這個例子就是指定了中等大小屏幕(例如筆記本電腦)下元素所佔的列寬度。
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| 
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| 在 Cat Photo App 中,將使用 `col-xs-*` , 其中 `xs` 是 extra small 的縮寫 (比如窄屏手機屏幕), `*` 是填寫的數字,代表一行中的元素該佔多少列寬。
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| 
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| 將 `Like`,`Info` 和 `Delete` 三個按鈕並排放入一個 `<div class="row">` 元素中,然後每個按鈕都各用一個 `<div class="col-xs-4">` 元素包裹起來。
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| 
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| 當 `div` 元素設置了 `row` class 之後,那幾個按鈕便會嵌入其中了。
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| 
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| # --hints--
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| 
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| 所有按鈕都需要嵌入到同一個 `div` 元素中, 並且該元素包含 `row` class 屬性。
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| 
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| ```js
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| assert($('div.row:has(button)').length > 0);
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| ```
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| 
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| 每個 Bootstrap 按鈕都需要嵌入各自的 `div` 元素,並且該元素包含 class 屬性 `col-xs-4`。
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| 
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| ```js
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| assert($('div.col-xs-4:has(button)').length > 2);
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| ```
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| 
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| 確保每一個 `button` 元素都有一個閉合標籤。
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| 
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| ```js
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| assert(
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|   code.match(/<\/button>/g) &&
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|     code.match(/<button/g) &&
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|     code.match(/<\/button>/g).length === code.match(/<button/g).length
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| );
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| ```
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| 
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| 確保每一個 `div` 元素都有一個閉合標籤。
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| 
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| ```js
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| assert(
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|   code.match(/<\/div>/g) &&
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|     code.match(/<div/g) &&
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|     code.match(/<\/div>/g).length === code.match(/<div/g).length
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| );
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| ```
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| 
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| # --seed--
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| 
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| ## --seed-contents--
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| 
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| ```html
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| <link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
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| <style>
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|   .red-text {
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|     color: red;
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|   }
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| 
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|   h2 {
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|     font-family: Lobster, Monospace;
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|   }
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| 
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|   p {
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|     font-size: 16px;
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|     font-family: Monospace;
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|   }
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| 
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|   .thick-green-border {
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|     border-color: green;
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|     border-width: 10px;
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|     border-style: solid;
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|     border-radius: 50%;
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|   }
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| 
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|   .smaller-image {
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|     width: 100px;
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|   }
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| </style>
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| 
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| <div class="container-fluid">
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|   <h2 class="red-text text-center">CatPhotoApp</h2>
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| 
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|   <p>Click here for <a href="#">cat photos</a>.</p>
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| 
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|   <a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
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| 
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|   <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/running-cats.jpg" class="img-responsive" alt="Three kittens running towards the camera.">
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|   <button class="btn btn-block btn-primary">Like</button>
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|   <button class="btn btn-block btn-info">Info</button>
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|   <button class="btn btn-block btn-danger">Delete</button>
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|   <p>Things cats love:</p>
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|   <ul>
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|     <li>cat nip</li>
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|     <li>laser pointers</li>
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|     <li>lasagna</li>
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|   </ul>
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|   <p>Top 3 things cats hate:</p>
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|   <ol>
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|     <li>flea treatment</li>
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|     <li>thunder</li>
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|     <li>other cats</li>
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|   </ol>
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|   <form action="https://freecatphotoapp.com/submit-cat-photo">
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|     <label><input type="radio" name="indoor-outdoor"> Indoor</label>
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|     <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
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|     <label><input type="checkbox" name="personality"> Loving</label>
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|     <label><input type="checkbox" name="personality"> Lazy</label>
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|     <label><input type="checkbox" name="personality"> Crazy</label>
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|     <input type="text" placeholder="cat photo URL" required>
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|     <button type="submit">Submit</button>
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|   </form>
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| </div>
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| ```
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| 
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| # --solutions--
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| 
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| ```html
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| <link href="https://fonts.googleapis.com/css?family=Lobster" rel="stylesheet" type="text/css">
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| <style>
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|   .red-text {
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|     color: red;
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|   }
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| 
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|   h2 {
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|     font-family: Lobster, Monospace;
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|   }
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| 
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|   p {
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|     font-size: 16px;
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|     font-family: Monospace;
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|   }
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| 
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|   .thick-green-border {
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|     border-color: green;
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|     border-width: 10px;
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|     border-style: solid;
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|     border-radius: 50%;
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|   }
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| 
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|   .smaller-image {
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|     width: 100px;
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|   }
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| </style>
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| 
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| <div class="container-fluid">
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|   <h2 class="red-text text-center">CatPhotoApp</h2>
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| 
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|   <p>Click here for <a href="#">cat photos</a>.</p>
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| 
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|   <a href="#"><img class="smaller-image thick-green-border" src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/relaxing-cat.jpg" alt="A cute orange cat lying on its back."></a>
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| 
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|   <img src="https://cdn.freecodecamp.org/curriculum/cat-photo-app/running-cats.jpg" class="img-responsive" alt="Three kittens running towards the camera.">
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|   <div class="row">
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|     <div class="col-xs-4">
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|       <button class="btn btn-block btn-primary">Like</button>
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|     </div>
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|     <div class="col-xs-4">
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|       <button class="btn btn-block btn-info">Info</button>
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|     </div>
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|     <div class="col-xs-4">
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|       <button class="btn btn-block btn-danger">Delete</button>
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|     </div>
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|   </div>
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| 
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|   <p>Things cats love:</p>
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|   <ul>
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|     <li>cat nip</li>
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|     <li>laser pointers</li>
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|     <li>lasagna</li>
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|   </ul>
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|   <p>Top 3 things cats hate:</p>
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|   <ol>
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|     <li>flea treatment</li>
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|     <li>thunder</li>
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|     <li>other cats</li>
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|   </ol>
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|   <form action="https://freecatphotoapp.com/submit-cat-photo">
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|     <label><input type="radio" name="indoor-outdoor"> Indoor</label>
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|     <label><input type="radio" name="indoor-outdoor"> Outdoor</label>
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|     <label><input type="checkbox" name="personality"> Loving</label>
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|     <label><input type="checkbox" name="personality"> Lazy</label>
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|     <label><input type="checkbox" name="personality"> Crazy</label>
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|     <input type="text" placeholder="cat photo URL" required>
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|     <button type="submit">Submit</button>
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|   </form>
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| </div>
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| ```
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