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>
124 lines
3.6 KiB
Markdown
124 lines
3.6 KiB
Markdown
---
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id: bad87fee1348bd9aed208826
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title: 使用 jQuery 选择元素的子元素
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challengeType: 6
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forumTopicId: 18320
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dashedName: target-the-children-of-an-element-using-jquery
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---
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# --description--
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把 HTML 标签放到另一个级别的标签里，这些 HTML 标签被称为该标签的`子标签（children element）`。例如，本次挑战中文本为 "#target1"、"#target2" 和 "#target3" 的按钮都是`<div class="well" id="left-well">`标签的`子标签`。
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jQuery 有一个`children()`方法，可以访问被选取标签的子标签。
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下面的代码展示了用`children()`方法把`left-well`标签的子标签的颜色设置成`蓝色（blue）`：
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`$("#left-well").children().css("color", "blue")`
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# --instructions--
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请把`right-well`标签的所有子标签颜色设置成`橙色（orange）`。
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# --hints--
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`#right-well`所有的子标签文本应该是橙色。
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```js
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assert($('#right-well').children().css('color') === 'rgb(255, 165, 0)');
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```
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应该用`children()`方法修改标签。
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```js
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assert(code.match(/\.children\(\)\.css/g));
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```
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仅用 jQuery 给标签添加类。
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```js
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assert(code.match(/<div class="well" id="right-well">/g));
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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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$(document).ready(function() {
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$("#target1").css("color", "red");
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$("#target1").prop("disabled", true);
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$("#target4").remove();
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$("#target2").appendTo("#right-well");
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$("#target5").clone().appendTo("#left-well");
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$("#target1").parent().css("background-color", "red");
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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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$("#target1").css("color", "red");
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$("#target1").prop("disabled", true);
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$("#target4").remove();
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$("#target2").appendTo("#right-well");
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$("#target5").clone().appendTo("#left-well");
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$("#target1").parent().css("background-color", "red");
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$("#right-well").children().css("color", "orange");
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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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