Question

I would like to have number (int) of ul with class ‘currentWeek’. My html look like this:

<div class="calendarContainer">
    <ul>
        <li></li>
        <li></li>
        <li></li>
    </ul>
    <ul>
        <li></li>
        <li></li>
        <li></li>
    </ul>
    <ul class="currentWeek">
        <li></li>
        <li></li>
        <li></li>
    </ul>
    <ul>
        <li></li>
        <li></li>
        <li></li>
    </ul>
</div>

this is how I could all UL’s

var weeksCount = widget.find(".calendarContainer").children().length;

But I have no idea how to know that currentWeek is third

Many thanks!

Answer 1

How about this:

widget.find('.currentWeek').index()

Quoting the .index doc:

If no argument is passed to the .index() method, the return value is
an integer indicating the position of the first element within the
jQuery object relative to its sibling elements.

You might want to add 1 to result, if you need to get the natural (not 0-based) number of that element.