down list (select box) using jQuery

2018-06-29 20:14:30

This question already has an answer here:

How can I get the ID of an element using jQuery? 17 answers

因为$("#yourdropdownid option:selected")返回一个没有id属性的jQuery对象，所以可以使用.attr（）来获取元素的id

$("#yourdropdownid option:selected").attr('id');

Get the id using .attr() or .prop() :

$("#yourdropdownid option:selected").prop('id')

$("#yourdropdownid option:selected").attr('id')

and if you want to use pure javascript then:

var obj=document.getElementById("myId").options[document.getElementById("myId").selectedIndex];
alert(obj.id);

Don't mix the jquery object with js property like $("#yourdropdownid option:selected").id .

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