我看过类似的问题：jQuery retrieve elements from nested classes，但仍在挣扎。
这是我的代码：
var Array = [];
$('li').each(function () {
if ($(this).has('a.online').length !== 0) {
Array.push($('a.online').attr("href"));
}
else {
Array.push("N/A");
}
});
我试图遍历每个<li>元素，以检查它是否具有嵌套的<a>且类为“ online”。如果不是，我想推送到数组“ N / A”，如果是，则将链接推送到数组。当前，它正确地推送了N / A，但是链接却被incorecctt推送了。第一个链接将与<li>一起推送到所有<a class="online">。即，而不是拥有
“不适用，不适用，链接1，链接2，链接3”
我有“不适用，不适用，链接1，链接1，链接1”
任何帮助或指导，将不胜感激。
Link to html list
答案 0 :(得分：1)
我认为问题出在这里
Array.push($('a.online').attr("href"));
将其更改为
Array.push($(this).find('a.online').attr("href"));
答案 1 :(得分：0)
有很多方法可以实现您的结果：
var arr = new Array($('li').length).fill('"N/A"');
$('li a.online').each(function (idx, ele) {
var idx = $(this).closest('li').index();
arr[idx] = this.href;
});
或：
var arr1 = $('li').map(function() {
if ($(this).has('a.online').length !== 0) {
return $('a.online').attr("href");
} else {
return "N/A";
}
}).get();
var arr = new Array($('li').length).fill('"N/A"');
$('li a.online').each(function (idx, ele) {
var idx = $(this).closest('li').index();
arr[idx] = this.href;
});
console.log(arr);
var arr1 = $('li').map(function() {
if ($(this).has('a.online').length !== 0) {
return $('a.online').attr("href");
} else {
return "N/A";
}
}).get();
console.log(arr1);<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<ul class="list">
<li>
<a class="link" href="https://ece.fiu.edu/academics/undergraduate/index.html" target="_blank">
<p class="program">Computer Engineering (BS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Undergraduate</span><br/><a
aria-label="Computer Engineering (BS) Online" class="online"
href="http://fiuonline.fiu.edu/programs/online-undergraduate-degrees/bachelor-of-science-in-computer-engineering.php"
target="_blank"><span class="hide format">Online</span>Available Online
<br/></a><strong>College: </strong><a class="college-link" href="https://cec.fiu.edu/" target="_blank"><span
class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Technology</span>
</li>
<li>
<a class="link" href="https://www.cis.fiu.edu/academics/degrees/graduate/master-of-science-in-computer-science/"
target="_blank">
<p class="program">Computer Science (MS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://cec.fiu.edu/" target="_blank"><span class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Technology</span>
</li>
<li>
<a class="link" href="https://www.cis.fiu.edu/academics/programs/grad/phdcs-summer-2013/" target="_blank">
<p class="program">Computer Science (PhD)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://cec.fiu.edu/" target="_blank"><span class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Technology</span>
</li>
<li>
<a class="link" href="https://schoolofconstruction.fiu.edu/academics/undergraduate/" target="_blank">
<p class="program">Construction Management (BS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Undergraduate</span><br/><strong>College: </strong><a
class="college-link" href="https://cec.fiu.edu/" target="_blank"><span class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Sciences and Engineering</span>
</li>
<li>
<a class="link" href="https://schoolofconstruction.fiu.edu/academics/graduate/" target="_blank">
<p class="program">Construction Management (MS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><a
aria-label="Construction Management (MS) Online" class="online"
href="http://fiuonline.fiu.edu/programs/online-graduate-degrees/master-of-construction-management.php"
target="_blank"><span class="hide format">Online</span>Available Online
<br/></a><strong>College: </strong><a class="college-link" href="https://cec.fiu.edu/" target="_blank"><span
class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Sciences and Engineering</span>
</li>
<li>
<a class="link" href="https://crsp.fiu.edu/academics/degrees-and-programs/MS-Counselor-Edu/index.html"
target="_blank">
<p class="program">Counselor Education (MS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://case.fiu.edu/" target="_blank"><span class="college">Arts, Sciences & Education</span></a>
</p>
<span class="area-of-interest hide">Education</span>
</li>
<li>
<a class="link" href="https://english.fiu.edu/creative-writing/" target="_blank">
<p class="program">Creative Writing (MFA)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://case.fiu.edu/" target="_blank"><span class="college">Arts, Sciences & Education</span></a>
</p>
<span class="area-of-interest hide">Humanities and Culture</span>
</li>
<li>
<a class="link" href="http://economics.fiu.edu/graduate/ma-in-economics/" target="_blank">
<p class="program">Economics (MA)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://sipa.fiu.edu/" target="_blank"><span class="college">Steven J. Green School of International and Public Affairs</span></a>
</p>
<span class="area-of-interest hide">Business and Economics</span>
</li>
<li>
<a class="link" href="http://economics.fiu.edu/graduate/phd-in-economics/" target="_blank">
<p class="program">Economics (PhD)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://sipa.fiu.edu/" target="_blank"><span class="college">Steven J. Green School of International and Public Affairs</span></a>
</p>
<span class="area-of-interest hide">Business and Economics</span>
</li>
<li>
<a class="link" href="http://education.fiu.edu/specialist_degrees.html?expanddiv=eds2" target="_blank">
<p class="program">Educational Leadership (EdS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://case.fiu.edu/" target="_blank"><span class="college">Arts, Sciences & Education</span></a>
</p>
<span class="area-of-interest hide">Education</span>
</li>
<li>
<a class="link" href="http://education.fiu.edu/masters_degrees.html?expanddiv=ms14,ms44" target="_blank">
<p class="program">Educational Leadership (MS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://case.fiu.edu/" target="_blank"><span class="college">Arts, Sciences & Education</span></a>
</p>
<span class="area-of-interest hide">Education</span>
</li>
<li>
<a class="link"
href="https://lps.fiu.edu/academics/degrees-and-programs/edd-educational-leadership-policy-studies/index.html"
target="_blank">
<p class="program">Educational Leadership and Policy Studies (EdD)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://case.fiu.edu/" target="_blank"><span class="college">Arts, Sciences & Education</span></a>
</p>
<span class="area-of-interest hide">Education</span>
</li>
<li>
<a class="link" href="https://ece.fiu.edu/academics/graduate/phd-electrical-computer-engineering/index.html"
target="_blank">
<p class="program">Electrical and Computer Engineering (PhD)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://cec.fiu.edu/" target="_blank"><span class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Sciences and Engineering Technology</span>
</li>
<li>
<a class="link" href="https://ece.fiu.edu/academics/undergraduate/index.html" target="_blank">
<p class="program">Electrical Engineering (BS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Undergraduate</span><br/><a
aria-label="Electrical Engineering (BS) Online" class="online"
href="http://fiuonline.fiu.edu/programs/online-undergraduate-degrees/bachelor-of-science-in-electrical-engineering.php"
target="_blank"><span class="hide format">Online</span>Available Online
<br/></a><strong>College: </strong><a class="college-link" href="https://cec.fiu.edu/" target="_blank"><span
class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Sciences and Engineering</span>
</li>
<li>
<a class="link" href="https://ece.fiu.edu/academics/graduate/master-engineering/index.html" target="_blank">
<p class="program">Electrical Engineering (MS)</p>
</a>
<p><strong>Degree type: </strong><span class="degree-type">Graduate</span><br/><strong>College: </strong><a
class="college-link" href="https://cec.fiu.edu/" target="_blank"><span class="college">Engineering & Computing</span></a>
</p>
<span class="area-of-interest hide">Sciences and Engineering Technology</span>
</li>
</ul>