获取Ul li宽度并将其设置为ul li ul的宽度

Question

Any way this is achievable? I would think something like:

IF( hover over element ) set child element width to element width .

But I don't really know how to start with it.

Answer 1

Using JQuery:

$("#hover_elem").hover(function () {
    $(this)
        .children()
        .first()
        .width($(this).width());
});

You should probably start with a tutorial ( http://www.w3schools.com/jquery/default.asp ) in order to learn how to use JQuery. JQuery is easier than Javascript but this will not help you to understand how Javascript works - and so knowing jQuery does not means that you know Javascript...