Files
freeCodeCamp/curriculum/challenges/italian/03-front-end-development-libraries/jquery/target-a-specific-child-of-an-element-using-jquery.md
Shaun Hamilton c2a11ad00d feat: add 'back/front end' in curriculum (#42596)
* chore: rename APIs and Microservices to include "Backend" (#42515)

* fix typo

* fix typo

* undo change

* Corrected grammar mistake

Corrected a grammar mistake by removing a comma.

* change APIs and Microservices cert title

* update title

* Change APIs and Microservices certi title

* Update translations.json

* update title

* feat(curriculum): rename apis and microservices cert

* rename folder structure

* rename certificate

* rename learn Markdown

* apis-and-microservices -> back-end-development-and-apis

* update backend meta

* update i18n langs and cypress test

Co-authored-by: Shaun Hamilton <shauhami020@gmail.com>

* fix: add development to front-end libraries (#42512)

* fix: added-the-word-Development-to-front-end-libraries

* fix/added-the-word-Development-to-front-end-libraries

* fix/added-word-development-to-front-end-libraries-in-other-related-files

* fix/added-the-word-Development-to-front-end-and-all-related-files

* fix/removed-typos-from-last-commit-in-index.md

* fix/reverted-changes-that-i-made-to-dependecies

* fix/removed xvfg

* fix/reverted changes that i made to package.json

* remove unwanted changes

* front-end-development-libraries changes

* rename backend certSlug and README

* update i18n folder names and keys

* test: add legacy path redirect tests

This uses serve.json from the client-config repo, since we currently use
that in production

* fix: create public dir before moving serve.json

* fix: add missing script

* refactor: collect redirect tests

* test: convert to cy.location for stricter tests

* rename certificate folder to 00-certificates

* change crowdin config to recognise new certificates location

* allow translations to be used

Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>

* add forwards slashes to path redirects

* fix cypress path tests again

* plese cypress

* fix: test different challenge

Okay so I literally have no idea why this one particular challenge
fails in Cypress Firefox ONLY. Tom and I paired and spun a full build
instance and confirmed in Firefox the page loads and redirects as
expected. Changing to another bootstrap challenge passes Cypress firefox
locally. Absolutely boggled by this.

AAAAAAAAAAAAAAA

* fix: separate the test

Okay apparently the test does not work unless we separate it into
a different `it` statement.

>:( >:( >:( >:(

Co-authored-by: Sujal Gupta <55016909+heysujal@users.noreply.github.com>
Co-authored-by: Noor Fakhry <65724923+NoorFakhry@users.noreply.github.com>
Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>
Co-authored-by: Nicholas Carrigan (he/him) <nhcarrigan@gmail.com>
2021-08-13 21:57:13 -05:00

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Markdown

---
id: bad87fee1348bd9aed108826
title: Individuare il figlio specifico di un elemento usando jQuery
challengeType: 6
forumTopicId: 18315
required:
-
link: 'https://cdnjs.cloudflare.com/ajax/libs/animate.css/3.2.0/animate.css'
dashedName: target-a-specific-child-of-an-element-using-jquery
---
# --description--
Hai già visto che gli attributi id sono molto convenienti per selezionare degli elementi con jQuery. Ma non avrai sempre degli id puliti con cui lavorare.
Fortunatamente, jQuery ha degli altri trucchi per la selezione degli elementi desiderati.
jQuery utilizza i selettori CSS per identificare gli elementi. Il selettore CSS `target:nth-child(n)` consente di selezionare tutti gli ennesimi elementi di una certa classe o tipo.
Ecco come potresti dare al terzo elemento in ogni well la classe bounce:
```js
$(".target:nth-child(3)").addClass("animated bounce");
```
Fai rimbalzare il secondo figlio in ciascuno dei tuoi elementi well. Devi selezionare i figli degli elementi con la classe `target`.
# --hints--
Il secondo elemento negli elementi `target` dovrebbe rimbalzare.
```js
assert(
$('.target:nth-child(2)').hasClass('animated') &&
$('.target:nth-child(2)').hasClass('bounce')
);
```
Solo due elementi dovrebbero rimbalzare.
```js
assert($('.animated.bounce').length === 2);
```
Dovresti usare il selettore `:nth-child()` per modificare questi elementi.
```js
assert(code.match(/\:nth-child\(/g));
```
Dovresti usare solo jQuery per aggiungere queste classi all'elemento.
```js
assert(
code.match(/\$\(".target:nth-child\(2\)"\)/g) ||
code.match(/\$\('.target:nth-child\(2\)'\)/g) ||
code.match(/\$\(".target"\).filter\(":nth-child\(2\)"\)/g) ||
code.match(/\$\('.target'\).filter\(':nth-child\(2\)'\)/g)
);
```
# --seed--
## --seed-contents--
```html
<script>
$(document).ready(function() {
$("#target1").css("color", "red");
$("#target1").prop("disabled", true);
$("#target4").remove();
$("#target2").appendTo("#right-well");
$("#target5").clone().appendTo("#left-well");
$("#target1").parent().css("background-color", "red");
$("#right-well").children().css("color", "orange");
});
</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() {
$("#target1").css("color", "red");
$("#target1").prop("disabled", true);
$("#target4").remove();
$("#target2").appendTo("#right-well");
$("#target5").clone().appendTo("#left-well");
$("#target1").parent().css("background-color", "red");
$("#right-well").children().css("color", "orange");
$(".target:nth-child(2)").addClass("animated bounce");
});
</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>
```