javascript - how to get width of ul on the base of class jquery? -

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how can width of <ul> on class name class name unique each <ul>.

i don't want select id, rather class can reused,

my <ul> html is:

<ul id="cat-sec-bar" class="restaurantssubtypedivclass" style="display: block;">     //some code here </ul>

i trying this:

 var divwidth = $(".restaurantssubtypedivclass").width();  //getting 0

what wrong here? other way it?

try one:

var divwidth = $(".restaurantssubtypedivclass").css('width');

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