.is() doesn't exist in Cheerio?

Question

I need to check if an element is last child like this

Determining if the element is the last child of its parent

But I use cheerio instead of jquery (for lighter weight) on node.js

https://github.com/MatthewMueller/cheerio

It gave me error:

TypeError: Object XXXXXXX has no method 'is'

Can someone confirm? If so, what is the elegant way to check if a node is last child?

Thanks.

Nathan Wall · Accepted Answer · 2013-02-28T06:40:47.020

1

Here's an example which adds an isLastSibling method for checking if an element is the last sibling.

var cheerio = require('cheerio'),
    $ = cheerio.load('<p><a>1</a><b>2</b><i>3</i></p>'),
    $fn = Object.getPrototypeOf($());

$fn.isLastSibling = function() {
    return this.parent().children().last()[0] === this[0];
};

console.log(
    $('a').isLastSibling(),
    $('b').isLastSibling(),
    $('i').isLastSibling()
);

The output you should get is false false true because the <a> and <b> elements are not the last siblings but the <i> element is.

edited Feb 28 '13 at 06:40

answered Feb 28 '13 at 06:07

Nathan Wall

10,530
4
24
47

Actually, `length` 0 when there is next() and `length` ` when it's last child. I just tested. Strange. Can you confirm? – HP. Feb 28 '13 at 06:11
You're right, it didn't work. I have modified my answer with a complete, tested example. – Nathan Wall Feb 28 '13 at 06:31

score 0 · Answer 2 · answered Feb 28 '13 at 06:12

0

Try

<script type="text/javascript">

    $(function()
    {
        $('dom').each(function()
        {
            var $this = $(this);
            if ( $this === $this.parent().last())
            {
                alert('got me!');
            }
        })
    });

</script>

answered Feb 28 '13 at 06:12

Dipesh Parmar

27,090
8
61
90

last() doesn't work in cheerio for some reason. It gave me the whole parent() node instead of the really last one :( – HP. Feb 28 '13 at 06:22
.last() Will select the last element of a cheerio object – Dipesh Parmar Feb 28 '13 at 06:25

score 0 · Answer 3 · answered Feb 28 '13 at 06:23

0

Check the jquery version it is using?

You can use last-child-selector for this

For example: $("div span:last-child").css('background','red');

Here is the docs http://api.jquery.com/last-child-selector/

answered Feb 28 '13 at 06:23

Rohan Kumar

40,431
11
76
106

I got the latest here and it doesn't use jQuery (I believe): https://github.com/MatthewMueller/cheerio. `div span:last-child` doesn't work because there are many other `non-span` elements in the `parent` that could be last child. – HP. Feb 28 '13 at 06:31

.is() doesn't exist in Cheerio?

3 Answers3