ee1e8abd87
* feat(tools): add seed/solution restore script * chore(curriculum): remove empty sections' markers * chore(curriculum): add seed + solution to Chinese * chore: remove old formatter * fix: update getChallenges parse translated challenges separately, without reference to the source * chore(curriculum): add dashedName to English * chore(curriculum): add dashedName to Chinese * refactor: remove unused challenge property 'name' * fix: relax dashedName requirement * fix: stray tag Remove stray `pre` tag from challenge file. Signed-off-by: nhcarrigan <nhcarrigan@gmail.com> Co-authored-by: nhcarrigan <nhcarrigan@gmail.com>
144 lines
4.0 KiB
Markdown
144 lines
4.0 KiB
Markdown
---
|
||
id: bad87fee1348bd9aed908626
|
||
title: 用多个 jQuery 选择器选择同一个元素
|
||
challengeType: 6
|
||
forumTopicId: 18322
|
||
required:
|
||
- link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
|
||
dashedName: target-the-same-element-with-multiple-jquery-selectors
|
||
---
|
||
|
||
# --description--
|
||
|
||
现在你知道三种选取标签的方法：用标签选择器，如`$("button")`；用类选择器，`$(".btn")`以及用 id 选择器，`$("#target1")`。
|
||
|
||
虽然可以在单个`.addClass()`内添加多个类，但是我们可以用*三种不同的方式*给一种标签添加类。
|
||
|
||
以三种不同的方式用`.addClass()`方法每次只给一种标签添加一个类：
|
||
|
||
给所有的`button`标签添加`animated`类。
|
||
|
||
给所有类为`.btn`的`button`标签添加`shake`类。
|
||
|
||
给所有 id 为`#target1`的`button`标签添加`btn-primary`类。
|
||
|
||
**注意：**
|
||
虽然三个选择器最终给 id 为`#target1`的`button`标签添加`shake`、`animated`和`btn-primary`等三个类，但是你需要用且仅用三种不同的选择器给三种标签各添加一个类（译者注：所谓的“一种标签”是指他们有某种共同的特点，如包含同一个 class）。
|
||
|
||
# --hints--
|
||
|
||
用`$('button')`选择标签。
|
||
|
||
```js
|
||
assert(code.match(/\$\s*?\(\s*?(?:'|")\s*?button\s*?(?:'|")/gi));
|
||
```
|
||
|
||
用`$('.btn')`选择标签。
|
||
|
||
```js
|
||
assert(code.match(/\$\s*?\(\s*?(?:'|")\s*?\.btn\s*?(?:'|")/gi));
|
||
```
|
||
|
||
用`$('#target1')`选择标签。
|
||
|
||
```js
|
||
assert(code.match(/\$\s*?\(\s*?(?:'|")\s*?#target1\s*?(?:'|")/gi));
|
||
```
|
||
|
||
三个选择器每个只添加一个类。
|
||
|
||
```js
|
||
assert(
|
||
code.match(/addClass/g) &&
|
||
code.match(/addClass\s*?\(\s*?('|")\s*?[\w-]+\s*?\1\s*?\)/g).length > 2
|
||
);
|
||
```
|
||
|
||
`#target1`标签应具有`animated`、`shake`和`btn-primary`三个类。
|
||
|
||
```js
|
||
assert(
|
||
$('#target1').hasClass('animated') &&
|
||
$('#target1').hasClass('shake') &&
|
||
$('#target1').hasClass('btn-primary')
|
||
);
|
||
```
|
||
|
||
仅用 jQuery 给标签添加类。
|
||
|
||
```js
|
||
assert(!code.match(/class.*animated/g));
|
||
```
|
||
|
||
# --seed--
|
||
|
||
## --seed-contents--
|
||
|
||
```html
|
||
<script>
|
||
$(document).ready(function() {
|
||
|
||
});
|
||
</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");
|
||
$(".btn").addClass("shake");
|
||
$("#target1").addClass("btn-primary");
|
||
});
|
||
</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>
|
||
```
|