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>
118 lines
3.3 KiB
Markdown
118 lines
3.3 KiB
Markdown
---
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id: bad87fee1348bd9bedc08826
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title: 使用 jQuery 配合元素选择器选择元素
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challengeType: 6
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forumTopicId: 18319
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required:
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- link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
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dashedName: target-html-elements-with-selectors-using-jquery
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---
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# --description--
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接下来我们学习`document ready function`。
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首先，我们完成第一个 jQuery 语句。所有的 jQuery 函数以`$`开头，这个符号通常被称为`美元符号（dollar sign operator）`或`bling`。
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jQuery 通常选取并操作带有`选择器（selector）`的 HTML 标签。
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例如，如果要所有`button`有弹性的动画效果，只需在`document ready function`中添加如下代码即可：
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`$("button").addClass("animated bounce");`
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请注意，为了能在编辑器里直接使用，我们已经为你在后台引入了 jQuery 库和 Animate.css 库。因此，你只需要通过 jQuery 给`button`元素添加`bounce`类就可以了。
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# --hints--
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用 jQuery 的`addClass()`方法给`button`标签添加`animated`和`bounce`类。
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```js
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assert($('button').hasClass('animated') && $('button').hasClass('bounce'));
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```
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仅用 jQuery 给标签添加颜色。
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```js
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assert(!code.match(/class.*animated/g));
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```
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jQuery 代码应该放在`$(document).ready();`函数里。
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```js
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assert(
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code.match(
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/\$\(document\)\.ready\(function.*(\s|\n)*.*button.*.addClass.*\);/g
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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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<script>
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$(document).ready(function() {
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});
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</script>
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<!-- Only change code above this line -->
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<div class="container-fluid">
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<h3 class="text-primary text-center">jQuery Playground</h3>
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<div class="row">
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<div class="col-xs-6">
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<h4>#left-well</h4>
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<div class="well" id="left-well">
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<button class="btn btn-default target" id="target1">#target1</button>
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<button class="btn btn-default target" id="target2">#target2</button>
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<button class="btn btn-default target" id="target3">#target3</button>
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</div>
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</div>
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<div class="col-xs-6">
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<h4>#right-well</h4>
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<div class="well" id="right-well">
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<button class="btn btn-default target" id="target4">#target4</button>
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<button class="btn btn-default target" id="target5">#target5</button>
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<button class="btn btn-default target" id="target6">#target6</button>
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</div>
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</div>
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</div>
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</div>
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```
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# --solutions--
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```html
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<script>
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$(document).ready(function() {
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$("button").addClass("animated bounce");
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});
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</script>
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<!-- Only change code above this line -->
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<div class="container-fluid">
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<h3 class="text-primary text-center">jQuery Playground</h3>
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<div class="row">
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<div class="col-xs-6">
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<h4>#left-well</h4>
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<div class="well" id="left-well">
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<button class="btn btn-default target" id="target1">#target1</button>
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<button class="btn btn-default target" id="target2">#target2</button>
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<button class="btn btn-default target" id="target3">#target3</button>
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</div>
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</div>
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<div class="col-xs-6">
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<h4>#right-well</h4>
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<div class="well" id="right-well">
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<button class="btn btn-default target" id="target4">#target4</button>
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<button class="btn btn-default target" id="target5">#target5</button>
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<button class="btn btn-default target" id="target6">#target6</button>
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</div>
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</div>
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</div>
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</div>
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```
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