175 lines
3.8 KiB
Markdown
175 lines
3.8 KiB
Markdown
---
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id: 5a94fe7769fb03452672e463
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title: 使用媒体查询创建响应式布局
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challengeType: 0
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videoUrl: 'https://scrimba.com/p/pByETK/cMbqeHk'
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forumTopicId: 301138
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dashedName: use-media-queries-to-create-responsive-layouts
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---
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# --description--
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将 CSS 网格与使用媒体查询结合使用，如使用媒体查询重新排列网格区域、更改网格尺寸以及重新排列网格项位置，我们可以让制作出的网站更具响应性。
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在右侧的预览区中，当网页可视区域的宽不小于 300px 时，列数从 1 变为 2。 并且，广告（advertisement）区域会完全占据左列。
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# --instructions--
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当网页可视区域的宽不小于 `400px` 时，请让 header 区域完全占据最顶行，footer 区域完全占据最底行。
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# --hints--
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当网页可视区域的宽度为 `400px` 或以上时，class 为 `container` 的元素应具有 `grid-template-areas` 属性，其属性值能够使 footer 和 header 区域分别占据顶行和底行，advert 和 content 区域分别占据中间行的左列和右列。
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```js
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assert(
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__helpers
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.removeCssComments(code)
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.match(
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/@media\s*?\(\s*?min-width\s*?:\s*?400px\s*?\)[\s\S]*.container\s*?{[\s\S]*grid-template-areas\s*?:\s*?"\s*?header\s*?header\s*?"\s*?"\s*?advert\s*?content\s*?"\s*?"\s*?footer\s*?footer\s*?"\s*?;[\s\S]*}/gi
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)
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);
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```
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# --seed--
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## --seed-contents--
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```html
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<style>
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.item1 {
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background: LightSkyBlue;
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grid-area: header;
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}
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.item2 {
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background: LightSalmon;
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grid-area: advert;
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}
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.item3 {
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background: PaleTurquoise;
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grid-area: content;
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}
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.item4 {
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background: lightpink;
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grid-area: footer;
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}
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.container {
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font-size: 1.5em;
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min-height: 300px;
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width: 100%;
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background: LightGray;
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display: grid;
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grid-template-columns: 1fr;
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grid-template-rows: 50px auto 1fr auto;
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grid-gap: 10px;
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grid-template-areas:
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"header"
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"advert"
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"content"
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"footer";
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}
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@media (min-width: 300px){
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.container{
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grid-template-columns: auto 1fr;
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grid-template-rows: auto 1fr auto;
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grid-template-areas:
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"advert header"
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"advert content"
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"advert footer";
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}
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}
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@media (min-width: 400px){
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.container{
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grid-template-areas:
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/* Only change code below this line */
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"advert header"
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"advert content"
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"advert footer";
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/* Only change code above this line */
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}
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}
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</style>
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<div class="container">
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<div class="item1">header</div>
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<div class="item2">advert</div>
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<div class="item3">content</div>
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<div class="item4">footer</div>
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</div>
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```
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# --solutions--
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```html
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<style>
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.item1 {
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background: LightSkyBlue;
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grid-area: header;
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}
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.item2 {
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background: LightSalmon;
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grid-area: advert;
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}
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.item3 {
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background: PaleTurquoise;
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grid-area: content;
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}
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.item4 {
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background: lightpink;
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grid-area: footer;
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}
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.container {
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font-size: 1.5em;
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min-height: 300px;
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width: 100%;
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background: LightGray;
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display: grid;
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grid-template-columns: 1fr;
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grid-template-rows: 50px auto 1fr auto;
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grid-gap: 10px;
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grid-template-areas:
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"header"
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"advert"
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"content"
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"footer";
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}
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@media (min-width: 300px){
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.container{
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grid-template-columns: auto 1fr;
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grid-template-rows: auto 1fr auto;
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grid-template-areas:
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"advert header"
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"advert content"
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"advert footer";
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}
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}
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@media (min-width: 400px){
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.container{
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grid-template-areas:
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"header header"
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"advert content"
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"footer footer";
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}
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}
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</style>
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<div class="container">
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<div class="item1">header</div>
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<div class="item2">advert</div>
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<div class="item3">content</div>
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<div class="item4">footer</div>
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</div>
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```
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