Html – jQuery: Count number of list elements

htmljquery

I've got a list that is generated from some server side code, before adding extra stuff to it with jQuery I need to figure out how many items are already in it.

<ul id="mylist">
    <li>Element 1</li>
    <li>Element 2</li>
</ul>

Best Solution

Try:

$("#mylist li").length

Just curious: why do you need to know the size? Can't you just use:

$("#mylist").append("<li>New list item</li>");

Related Solutions

Javascript – n “exists” function for jQuery

In JavaScript, everything is 'truthy' or 'falsy', and for numbers 0 means false, everything else true. So you could write:

if ($(selector).length)

You don't need that >0 part.

Javascript – How to check if an element is hidden in jQuery

Since the question refers to a single element, this code might be more suitable:

// Checks CSS content for display:[none|block], ignores visibility:[true|false]
$(element).is(":visible");

// The same works with hidden
$(element).is(":hidden");

It is the same as twernt's suggestion, but applied to a single element; and it matches the algorithm recommended in the jQuery FAQ.

We use jQuery's is() to check the selected element with another element, selector or any jQuery object. This method traverses along the DOM elements to find a match, which satisfies the passed parameter. It will return true if there is a match, otherwise return false.

Best Solution

Related Solutions

Javascript – n “exists” function for jQuery

Javascript – How to check if an element is hidden in jQuery

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