jquery - Dropdown doesn't contain empty value, still gets selected -

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this question has answer here:

i have weird issue.

i have dropdown no empty value option i.e. 

<option value="">select</option>

my dropdown:

<select name="dropdown" id="dropdown">     <option value="0">option 0</option>     <option value="1">option 1</option> </select>

however, when set the dropdown value so:

$('#dropdown').val("")

the dropdown shows empty option eventhough there no such option available in list. why happen? i've checked code , html , don't find empty option or code sets empty option.

what cause of this?

if pass non existing value(it not necessary pass "" ) method clear select element since there no matching option. therefore use selected index select option dynamically.

$("#list")[0].selectedindex = 1;

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