00b37093db
* fix(curriculum) replace single-line blocks with multi-line blocks for Front End Libraries #41523 Second attempt * Update curriculum/challenges/english/03-front-end-libraries/react/use--for-a-more-concise-conditional.md Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com> Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
144 lines
4.2 KiB
Markdown
144 lines
4.2 KiB
Markdown
---
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id: bad87fee1348bd9aed108826
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title: Target a Specific Child of an Element Using jQuery
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challengeType: 6
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forumTopicId: 18315
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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-a-specific-child-of-an-element-using-jquery
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---
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# --description--
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You've seen why id attributes are so convenient for targeting with jQuery selectors. But you won't always have such neat ids to work with.
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Fortunately, jQuery has some other tricks for targeting the right elements.
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jQuery uses CSS Selectors to target elements. The `target:nth-child(n)` CSS selector allows you to select all the nth elements with the target class or element type.
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Here's how you would give the third element in each well the bounce class:
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```js
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$(".target:nth-child(3)").addClass("animated bounce");
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```
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Make the second child in each of your well elements bounce. You must select the elements' children with the `target` class.
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# --hints--
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The second element in your `target` elements should bounce.
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```js
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assert(
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$('.target:nth-child(2)').hasClass('animated') &&
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$('.target:nth-child(2)').hasClass('bounce')
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);
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```
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Only two elements should bounce.
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```js
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assert($('.animated.bounce').length === 2);
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```
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You should use the `:nth-child()` selector to modify these elements.
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```js
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assert(code.match(/\:nth-child\(/g));
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```
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You should only use jQuery to add these classes to the element.
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```js
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assert(
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code.match(/\$\(".target:nth-child\(2\)"\)/g) ||
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code.match(/\$\('.target:nth-child\(2\)'\)/g) ||
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code.match(/\$\(".target"\).filter\(":nth-child\(2\)"\)/g) ||
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code.match(/\$\('.target'\).filter\(':nth-child\(2\)'\)/g)
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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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$(document).ready(function() {
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$("#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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# --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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$(".target:nth-child(2)").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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