jquery - How many li there are inside ul with javascript - Stack Overflow

admin管理员组

文章数量:1344448

How can I know how many li there are inside in the first ul?

I know I can use .length, but I want just the number of first-ul

<ul class="first-ul">
    <li>1</li>
    <li>2</li>
    <li>
        <ul class="second-ul">
            <li>2.1</li>
            <li>2.2</li>
        </ul>
    </li>
</ul>

/

How can I know how many li there are inside in the first ul?

I know I can use .length, but I want just the number of first-ul

<ul class="first-ul">
    <li>1</li>
    <li>2</li>
    <li>
        <ul class="second-ul">
            <li>2.1</li>
            <li>2.2</li>
        </ul>
    </li>
</ul>

http://jsfiddle/5oykbysk/

• javascript
• jquery
• html-lists

Share Follow asked Aug 25, 2014 at 16:44 user2600853user2600853 10111 silver badge1212 bronze badges 1

• So you're asking how to select direct children of an element? – cookie monster Commented Aug 25, 2014 at 17:08

Add a ment  | 

4 Answers 4

Sorted by: Reset to default 5

Use > to get immediate children li:

alert(number = $('ul.first-ul > li').length);

FIDDLE:

http://jsfiddle/5oykbysk/1/

See JQUERY DOCS for details

[].filter.call(
    document.getElementsByClassName('first-ul')[0].children, 
    function (el) {
        return el.nodeName === 'LI';
    }
).length

use jQuery child selector. Try this:

$('ul.first-ul > li').length

DEMO

it's the best and easy way :

var x = document.getElementsByClassName(".first-ul").childElementCount;
alert (x);

Visit https://www.w3schools./jsref/prop_element_childelementcount.asp

本文标签： jqueryHow many li there are inside ul with javascriptStack Overflow