遍歷UL LI以獲取<a>文本值</a>

Question

如何循環遍歷UL LI列表以獲取我的<a>文本值？

這是我嘗試過的：

<ul class="tabs">
    <li><a href='#tab1'>tabOne</a></li>
    <li><a href='#tab2'>tabTwo</a></li>
    <li><a href='#tab3'>tabThree</a></li>
    <li><a href='#tab4'>tabFour</a></li>
</ul>

function test() {
    var x = $("ul.tabs li").length
    alert(x)
    for (i = 0; i < x i++) { 

    }
}

Answer 1

您可以使用.each()完成此任務：

 //for each "ul.tabs a" elements $("ul.tabs a").each(function() { // $(this) represents to current iterated DOM element // $(this) is "a" element selector // If we were using a for(var i = 0;. . .) loop for arrayName[], $(this) would be arrayName[i] console.log($(this).text()); }); 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <ul class="tabs"> <li><a href='#tab1'>tabOne</a></li> <li><a href='#tab2'>tabTwo</a></li> <li><a href='#tab3'>tabThree</a></li> <li><a href='#tab4'>tabFour</a></li> </ul> 

Answer 2

for循環是轉到方法的好方法，但是要小心地將jQuery方法和屬性與普通的JavaScript方法和屬性混合使用。 他們無法識別對方的物體。

演示中詳細評論

演示版

 // This jQuery Object is like an array-like object var lnx = $('.tabs a'); /* The .length property applies to any jQuery Object || Using let to define the increment variable is safe */ for (let i = 0; i < lnx.length; i++) { /* Since lnx is array-like, we can use bracket || notation to keep track of its current index || on each iteration. || The plain JavaScript property .textContent || works on lnx because the brackets and || index number dereferrences the jQuery Object || into a plain JavaScript Object */ var txt = lnx[i].textContent; // Log results on each iteration console.log(txt + '\\n'); } 

 <script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script> <ul class="tabs"> <li><a href='#tab1'>tabOne</a></li> <li><a href='#tab2'>tabTwo</a></li> <li><a href='#tab3'>tabThree</a></li> <li><a href='#tab4'>tabFour</a></li> </ul>