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>
130 lines
3.7 KiB
Markdown
130 lines
3.7 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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你能用 jQuery 改变起始标签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，你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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下面的代码效果是重写并强调标题文本：
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`$("h3").html("<em>jQuery Playground</em>");`
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类似的，jQuery 有一个`.text()`函数，其改变文本而不增加标签。换而言之，该函数会忽略所有传递过来的 HTML 标签，并将其视为用来替换原文本的文本。
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请强调 id 为`target4`的按钮的文本。
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请查看此[链接](https://www.freecodecamp.org/news/html-elements-explained-what-are-html-tags/#em-elemen)来了解更多`<i>`和`<em>`的区别和用法。
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注意，`<i>`标签虽然传统上用来强调文本，但此后常用作图标的标签；`<em>`标签作为强调标签现在已被广泛接受。两者都可以应对本次挑战。
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# --hints--
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通过添加 HTML 标签强调`target4`按钮中的文本。
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```js
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assert.isTrue(
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/<em>|<i>\s*#target4\s*<\/em>|<\/i>/gi.test($('#target4').html())
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);
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```
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确保文本不乱。
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```js
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assert($('#target4') && $('#target4').text().trim() === '#target4');
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```
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不改变其他任何文本内容。
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```js
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assert.isFalse(/<em>|<i>/gi.test($('h3').html()));
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```
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确保使用`.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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确保用 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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