114 lines
3.3 KiB
Markdown
114 lines
3.3 KiB
Markdown
|
---
|
||
|
|
id: bad87fee1348bd9aedc08826
|
||
|
|
title: 使用 jQuery class 選擇器選擇元素
|
||
|
|
challengeType: 6
|
||
|
|
forumTopicId: 18316
|
||
|
|
required:
|
||
|
|
-
|
||
|
|
link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
|
||
|
|
dashedName: target-elements-by-class-using-jquery
|
||
|
|
---
|
||
|
|
|
||
|
|
# --description--
|
||
|
|
|
||
|
|
如何使所有的 `button` 標籤都有彈跳的動畫效果？ 用 `$("button")` 選取所有的 button 標籤，並用 `.addClass("animated bounce");` 給其添加一些 CSS 屬性。
|
||
|
|
|
||
|
|
jQuery 的 `.addClass()` 方法用來給標籤添加類。
|
||
|
|
|
||
|
|
首先，使用 `$(".well")` 選取類爲 `well` 的 `div` 標籤。
|
||
|
|
|
||
|
|
值得注意的是，和 CSS 聲明一樣，在類名前需要添加 `.`。
|
||
|
|
|
||
|
|
然後，用 jQuery 的 `.addClass()` 方法添加 `animated` 和 `shake` class。
|
||
|
|
|
||
|
|
例如，在 `document ready function` 中添加下面的代碼，使所有類爲 `text-primary` 的標籤抖動：
|
||
|
|
|
||
|
|
```js
|
||
|
|
$(".text-primary").addClass("animated shake");
|
||
|
|
```
|
||
|
|
|
||
|
|
# --hints--
|
||
|
|
|
||
|
|
應該用 jQuery 的 `addClass()` 方法給所有 class 爲 `well` 的元素添加 `animated` 和 `shake` class。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert($('.well').hasClass('animated') && $('.well').hasClass('shake'));
|
||
|
|
```
|
||
|
|
|
||
|
|
應該僅用 jQuery 給元素添加這些 class。
|
||
|
|
|
||
|
|
```js
|
||
|
|
assert(!code.match(/class\.\*animated/g));
|
||
|
|
```
|
||
|
|
|
||
|
|
# --seed--
|
||
|
|
|
||
|
|
## --seed-contents--
|
||
|
|
|
||
|
|
```html
|
||
|
|
<script>
|
||
|
|
$(document).ready(function() {
|
||
|
|
$("button").addClass("animated bounce");
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<!-- Only change code above this line -->
|
||
|
|
|
||
|
|
<div class="container-fluid">
|
||
|
|
<h3 class="text-primary text-center">jQuery Playground</h3>
|
||
|
|
<div class="row">
|
||
|
|
<div class="col-xs-6">
|
||
|
|
<h4>#left-well</h4>
|
||
|
|
<div class="well" id="left-well">
|
||
|
|
<button class="btn btn-default target" id="target1">#target1</button>
|
||
|
|
<button class="btn btn-default target" id="target2">#target2</button>
|
||
|
|
<button class="btn btn-default target" id="target3">#target3</button>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="col-xs-6">
|
||
|
|
<h4>#right-well</h4>
|
||
|
|
<div class="well" id="right-well">
|
||
|
|
<button class="btn btn-default target" id="target4">#target4</button>
|
||
|
|
<button class="btn btn-default target" id="target5">#target5</button>
|
||
|
|
<button class="btn btn-default target" id="target6">#target6</button>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
```
|
||
|
|
|
||
|
|
# --solutions--
|
||
|
|
|
||
|
|
```html
|
||
|
|
<script>
|
||
|
|
$(document).ready(function() {
|
||
|
|
$("button").addClass("animated bounce");
|
||
|
|
$(".well").addClass("animated shake");
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
|
||
|
|
<!-- Only change code above this line -->
|
||
|
|
|
||
|
|
<div class="container-fluid">
|
||
|
|
<h3 class="text-primary text-center">jQuery Playground</h3>
|
||
|
|
<div class="row">
|
||
|
|
<div class="col-xs-6">
|
||
|
|
<h4>#left-well</h4>
|
||
|
|
<div class="well" id="left-well">
|
||
|
|
<button class="btn btn-default target" id="target1">#target1</button>
|
||
|
|
<button class="btn btn-default target" id="target2">#target2</button>
|
||
|
|
<button class="btn btn-default target" id="target3">#target3</button>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div class="col-xs-6">
|
||
|
|
<h4>#right-well</h4>
|
||
|
|
<div class="well" id="right-well">
|
||
|
|
<button class="btn btn-default target" id="target4">#target4</button>
|
||
|
|
<button class="btn btn-default target" id="target5">#target5</button>
|
||
|
|
<button class="btn btn-default target" id="target6">#target6</button>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
```
|