to get the selected value from HTML select:
options[selectedIndex].value
what if i want to get the "id"
on the selected option?
Without making too many assumptions (ie select is a valid SELECT Element),
var options = select.options;
var id = options[options.selectedIndex].id;
var value = options[options.selectedIndex].value;
or,
var options = select.options;
var value = (options.selectedIndex != -1) ? options[selectedIndex].value : null;
var id = (options.selectedIndex != -1) ? options[selectedIndex].id : null;
Always check for falsity (or values that evaluate to false ). Ex 2 sets variables to null (if there is nothing selected).
就像这样简单:
options[selectedIndex].id
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