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											2018-10-10 18:03:03 -04:00
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							|  |  |  |  | id: 5a94fe3669fb03452672e45f | 
					
						
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											2020-12-16 00:37:30 -07:00
										 |  |  |  | title: 使用 repeat 函数减少重复 | 
					
						
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											2018-10-10 18:03:03 -04:00
										 |  |  |  | challengeType: 0 | 
					
						
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											2020-02-11 21:39:15 +08:00
										 |  |  |  | videoUrl: 'https://scrimba.com/p/pByETK/cQvqyHR' | 
					
						
							|  |  |  |  | forumTopicId: 301133 | 
					
						
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											2021-01-13 03:31:00 +01:00
										 |  |  |  | dashedName: reduce-repetition-using-the-repeat-function | 
					
						
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											2018-10-10 18:03:03 -04:00
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										 |  |  |  | # --description--
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											2021-01-08 11:20:48 -08:00
										 |  |  |  | 使用 `grid-template-columns` 或 `grid-template-rows` 定义网格结构时,你需要为添加的每一行或每一列都输入一个值。 | 
					
						
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											2021-02-06 04:42:36 +00:00
										 |  |  |  | 如果一个网格共有 100 行且每行高度相同, 那我们就需要输入 100 个值,这显然不太实际。 为此,更好的方式是使用 `repeat` 方法指定行或列的重复次数,后面加上逗号以及需要重复的值。 | 
					
						
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										 |  |  |  | 以下为添加 100 行网格的例子,每行高度均为 50px: | 
					
						
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							|  |  |  |  | ```css | 
					
						
							|  |  |  |  | grid-template-rows: repeat(100, 50px); | 
					
						
							|  |  |  |  | ``` | 
					
						
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											2021-02-06 04:42:36 +00:00
										 |  |  |  | 你还可以用 repeat 方法重复多个值,并在定义网格结构时与其他值一起使用。 比如: | 
					
						
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											2020-02-11 21:39:15 +08:00
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							|  |  |  |  | ```css | 
					
						
							|  |  |  |  | grid-template-columns: repeat(2, 1fr 50px) 20px; | 
					
						
							|  |  |  |  | ``` | 
					
						
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							|  |  |  |  | 效果相当于: | 
					
						
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							|  |  |  |  | ```css | 
					
						
							|  |  |  |  | grid-template-columns: 1fr 50px 1fr 50px 20px; | 
					
						
							|  |  |  |  | ``` | 
					
						
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											2021-01-08 11:20:48 -08:00
										 |  |  |  | **注意:**`1fr 50px` 重复了两次,后面跟着 20px。 | 
					
						
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											2020-12-16 00:37:30 -07:00
										 |  |  |  | # --instructions--
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											2018-10-10 18:03:03 -04:00
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											2021-01-08 11:20:48 -08:00
										 |  |  |  | 请用 `repeat` 代替 `grid-template-columns` 属性值中的重复代码。 | 
					
						
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										 |  |  |  | # --hints--
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											2018-10-10 18:03:03 -04:00
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										 |  |  |  | class 为 `container` 的元素应具有 `grid-template-columns` 属性,其属性值应设置为重复 3 列,且每列宽度为 `1fr`。 | 
					
						
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											2020-02-11 21:39:15 +08:00
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											2018-10-10 18:03:03 -04:00
										 |  |  |  | ```js | 
					
						
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										 |  |  |  | assert( | 
					
						
							|  |  |  |  |   code.match( | 
					
						
							|  |  |  |  |     /.container\s*?{[\s\S]*grid-template-columns\s*?:\s*?repeat\s*?\(\s*?3\s*?,\s*?1fr\s*?\)\s*?;[\s\S]*}/gi | 
					
						
							|  |  |  |  |   ) | 
					
						
							|  |  |  |  | ); | 
					
						
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										 |  |  |  | ``` | 
					
						
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											2021-01-13 03:31:00 +01:00
										 |  |  |  | # --seed--
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							|  |  |  |  | ## --seed-contents--
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							|  |  |  |  | ```html | 
					
						
							|  |  |  |  | <style> | 
					
						
							|  |  |  |  |   .item1{background:LightSkyBlue;} | 
					
						
							|  |  |  |  |   .item2{background:LightSalmon;} | 
					
						
							|  |  |  |  |   .item3{background:PaleTurquoise;} | 
					
						
							|  |  |  |  |   .item4{background:LightPink;} | 
					
						
							|  |  |  |  |   .item5{background:PaleGreen;} | 
					
						
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							|  |  |  |  |   .container { | 
					
						
							|  |  |  |  |     font-size: 40px; | 
					
						
							|  |  |  |  |     min-height: 300px; | 
					
						
							|  |  |  |  |     width: 100%; | 
					
						
							|  |  |  |  |     background: LightGray; | 
					
						
							|  |  |  |  |     display: grid; | 
					
						
							|  |  |  |  |     /* Only change code below this line */ | 
					
						
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							|  |  |  |  |     grid-template-columns: 1fr 1fr 1fr; | 
					
						
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							|  |  |  |  |     /* Only change code above this line */ | 
					
						
							|  |  |  |  |     grid-template-rows: 1fr 1fr 1fr; | 
					
						
							|  |  |  |  |     grid-gap: 10px; | 
					
						
							|  |  |  |  |   } | 
					
						
							|  |  |  |  | </style> | 
					
						
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							|  |  |  |  | <div class="container"> | 
					
						
							|  |  |  |  |   <div class="item1">1</div> | 
					
						
							|  |  |  |  |   <div class="item2">2</div> | 
					
						
							|  |  |  |  |   <div class="item3">3</div> | 
					
						
							|  |  |  |  |   <div class="item4">4</div> | 
					
						
							|  |  |  |  |   <div class="item5">5</div> | 
					
						
							|  |  |  |  | </div> | 
					
						
							|  |  |  |  | ``` | 
					
						
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											2020-12-16 00:37:30 -07:00
										 |  |  |  | # --solutions--
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										 |  |  |  | ```html | 
					
						
							|  |  |  |  | <style>.container {grid-template-columns: repeat(3, 1fr);}</style> | 
					
						
							|  |  |  |  | ``` |