当我得到带有 $this 的 select 框时，如何计算选项标签的数量

Question

I have a question as to how can I calculate number of options tag when I get the select box with $this.

Like that:

 $("select[name=rabetas]").click(function(){
   var $this = $(this);

And...?

how can I do this?

Answer 1

Select the <option> elements , and then get the length .

var numOptions = $this.children().length;

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Learn to dig through the jQuery API docs . They will answer 99% of your questions.

Answer 2

Counting the number of options tag in the Select Dom element in JQuery

Answer 3

If you want to loop through a collection of select list items, inspecting the DOM will show that each item has an object array with one item so you can use the following code...

$('.myddlclass').each(function (index) {
    var options = $(this)[0].options.length;
});

Answer 4

If I understand what you're trying to do, I believe you can use

$("select[name="rabetas"] option").size();