* 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>
132 lines
3.8 KiB
Markdown
132 lines
3.8 KiB
Markdown
---
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id: 564944c91be2204b269d51e3
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title: 使用 jQuery 更改元素内部的文本
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challengeType: 6
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forumTopicId: 16773
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dashedName: change-text-inside-an-element-using-jquery
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---
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# --description--
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可以通过 jQuery 改变元素开始和结束标签之间的文本。 甚至改变 HTML 标签。
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jQuery 有一个 `.html()` 函数,能用其在标签里添加 HTML 标签和文本, 函数提供的内容将完全替换之前标签的内容。
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下面是重写并强调标题文本的代码:
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```js
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$("h3").html("<em>jQuery Playground</em>");
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```
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jQuery 还有一个类似的函数 `.text()`,可以在不添加标签的前提下改变标签内的文本。 换句话说,这个函数不会评估传递给它的任何 HTML 标记,而是将其视为要替换现有内容的文本。
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给 id 为 `target4` 的按钮的文本添加强调效果。
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查看这篇[关于 <em> 的文章](https://www.freecodecamp.org/news/html-elements-explained-what-are-html-tags/#em-element)来了解更多 `<i>` 和 `<em>` 的区别和用法。
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注意,`<i>` 标签虽然传统上用来强调文本,但此后常用作图标的标签。 `<em>` 标签作为强调标签现在已被广泛接受。 可以使用任意一种完成这个挑战。
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# --hints--
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应该通过添加 HTML 标签强调 `target4` 按钮中的文本。
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```js
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assert.isTrue(
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/<em>|<i>\s*#target4\s*<\/em>|<\/i>/gi.test($('#target4').html())
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);
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```
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文本应该保持不变。
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```js
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assert($('#target4') && $('#target4').text().trim() === '#target4');
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```
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不应该改变其它任何文本内容。
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```js
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assert.isFalse(/<em>|<i>/gi.test($('h3').html()));
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```
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应该使用 `.html()` 方法而不是 `.text()` 方法。
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```js
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assert(code.match(/\.html\(/g));
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```
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应该使用 jQuery 选取 `button id="target4"`。
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```js
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assert(code.match(/\$\(\s*?(\"|\')#target4(\"|\')\s*?\)\.html\(/));
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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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});
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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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$("#target4").html('<em>#target4</em>');
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});
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</script>
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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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