92 lines
3.5 KiB
Markdown
92 lines
3.5 KiB
Markdown
---
|
|
id: bad87fee1348bd9aed308826
|
|
title: Target the Parent of an Element Using jQuery
|
|
challengeType: 6
|
|
videoUrl: ''
|
|
localeTitle: 使用jQuery定位元素的父级
|
|
---
|
|
|
|
## Description
|
|
<section id="description">每个HTML元素都有一个<code>parent</code>元素，它从中<code>inherits</code>属性。例如，您的<code>jQuery Playground</code> <code>h3</code>元素具有<code><div class="container-fluid"></code>的父元素，它本身具有父<code>body</code> 。 jQuery有一个名为<code>parent()</code>的函数，允许您访问您选择的任何元素的父级。下面是一个如何使用<code>parent()</code>函数的例子，如果你想给<code>left-well</code>元素的父元素一个蓝色的背景颜色： <code>$("#left-well").parent().css("background-color", "blue")</code>为<code>#target1</code>元素的父级<code>#target1</code>背景颜色为红色。 </section>
|
|
|
|
## Instructions
|
|
<section id="instructions">
|
|
</section>
|
|
|
|
## Tests
|
|
<section id='tests'>
|
|
|
|
```yml
|
|
tests:
|
|
- text: 你的<code>left-well</code>元素应该有红色背景。
|
|
testString: 'assert($("#left-well").css("background-color") === "red" || $("#left-well").css("background-color") === "rgb(255, 0, 0)" || $("#left-well").css("background-color").toLowerCase() === "#ff0000" || $("#left-well").css("background-color").toLowerCase() === "#f00", "Your <code>left-well</code> element should have a red background.");'
|
|
- text: 您应该使用<code>.parent()</code>函数来修改此元素。
|
|
testString: 'assert(code.match(/\.parent\s*\(\s*\)\s*\.css/g), "You should use the <code>.parent()</code> function to modify this element.");'
|
|
- text: '应该在<code>#target1</code>元素上调用<code>.parent()</code>方法。'
|
|
testString: 'assert(code.match(/\$\s*?\(\s*?(?:"|")\s*?#target1\s*?(?:"|")\s*?\)\s*?\.parent/gi), "The <code>.parent()</code> method should be called on the <code>#target1</code> element.");'
|
|
- text: 只使用jQuery将这些类添加到元素中。
|
|
testString: 'assert(code.match(/<div class="well" id="left-well">/g), "Only use jQuery to add these classes to the element.");'
|
|
|
|
```
|
|
|
|
</section>
|
|
|
|
## Challenge Seed
|
|
<section id='challengeSeed'>
|
|
|
|
<div id='html-seed'>
|
|
|
|
```html
|
|
<script>
|
|
$(document).ready(function() {
|
|
$("#target1").css("color", "red");
|
|
$("#target1").prop("disabled", true);
|
|
$("#target4").remove();
|
|
$("#target2").appendTo("#right-well");
|
|
$("#target5").clone().appendTo("#left-well");
|
|
|
|
});
|
|
</script>
|
|
|
|
<!-- Only change code above this line. -->
|
|
|
|
<body>
|
|
<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>
|
|
</body>
|
|
|
|
```
|
|
|
|
</div>
|
|
|
|
|
|
|
|
</section>
|
|
|
|
## Solution
|
|
<section id='solution'>
|
|
|
|
```js
|
|
// solution required
|
|
```
|
|
</section>
|