3.2 KiB
3.2 KiB
id, title, challengeType, videoUrl, forumTopicId, dashedName
id | title | challengeType | videoUrl | forumTopicId | dashedName |
---|---|---|---|---|---|
bad87fee1348bd9aedd08835 | 给单选按钮和复选框添加默认选中项 | 0 | https://scrimba.com/p/pVMPUv/cWk3Qh6 | 301094 | check-radio-buttons-and-checkboxes-by-default |
--description--
用 checked
属性把第一个复选框和单选按钮都设置为默认选中。
要实现以上要求,只需给 input 元素添加 "checked" 属性。 例如:
<input type="radio" name="test-name" checked>
--instructions--
把第一个单选按钮和第一个复选框都设置为默认选中。
--hints--
表单的第一个多选按钮应被默认选中。
assert($('input[type="radio"]').prop('checked'));
表单的第一个复选框应被默认选中。
assert($('input[type="checkbox"]').prop('checked'));
--seed--
--seed-contents--
<h2>CatPhotoApp</h2>
<main>
<p>Click here to view more <a href="#">cat photos</a>.</p>
<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
<p>Things cats love:</p>
<ul>
<li>cat nip</li>
<li>laser pointers</li>
<li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
<li>flea treatment</li>
<li>thunder</li>
<li>other cats</li>
</ol>
<form action="https://freecatphotoapp.com/submit-cat-photo">
<label for="indoor"><input id="indoor" type="radio" name="indoor-outdoor" value="indoor"> Indoor</label>
<label for="outdoor"><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label><br>
<label for="loving"><input id="loving" type="checkbox" name="personality" value="loving"> Loving</label>
<label for="lazy"><input id="lazy" type="checkbox" name="personality" value="lazy"> Lazy</label>
<label for="energetic"><input id="energetic" type="checkbox" name="personality" value="energetic"> Energetic</label><br>
<input type="text" placeholder="cat photo URL" required>
<button type="submit">Submit</button>
</form>
</main>
--solutions--
<h2>CatPhotoApp</h2>
<main>
<p>Click here to view more <a href="#">cat photos</a>.</p>
<a href="#"><img src="https://bit.ly/fcc-relaxing-cat" alt="A cute orange cat lying on its back."></a>
<p>Things cats love:</p>
<ul>
<li>cat nip</li>
<li>laser pointers</li>
<li>lasagna</li>
</ul>
<p>Top 3 things cats hate:</p>
<ol>
<li>flea treatment</li>
<li>thunder</li>
<li>other cats</li>
</ol>
<form action="https://freecatphotoapp.com/submit-cat-photo">
<label for="indoor"><input id="indoor" type="radio" name="indoor-outdoor" value="indoor" checked> Indoor</label>
<label for="outdoor"><input id="outdoor" type="radio" name="indoor-outdoor" value="outdoor"> Outdoor</label><br>
<label for="loving"><input id="loving" type="checkbox" name="personality" value="loving" checked> Loving</label>
<label for="lazy"><input id="lazy" type="checkbox" name="personality" value="lazy"> Lazy</label>
<label for="energetic"><input id="energetic" type="checkbox" name="personality" value="energetic"> Energetic</label><br>
<input type="text" placeholder="cat photo URL" required>
<button type="submit">Submit</button>
</form>
</main>