HTML for select and options:
<select class="dropdown">
<option value="one">One</option>
<option value="two">Two</option>
<option value="three">Three</option>
</select>
I want the value of the option at index 1, something along the lines of
$('.dropdown[1]').value
// should return 'two'
$('.dropdown option').eq(1).val()
eq() will start with 0 as it is an index
Get the currently selected value with
$('.dropdown option:selected').val()
use text() instead of val() to retrieve the text content
To get the text:
var list = document.getElementById("dropdown");
var value = list.options[1].text;
You can use this to get the value:
$('select.dropdown option').eq(1).val();
An this to get the text:
$('select.dropdown option').eq(1).text();
Demo here
来源：https://stackoverflow.com/questions/18520594/get-value-of-html-select-option-using-its-index-with-jquery