Question

99

Select Option Value return Integer by default

rated 0 times [ 101] [ 2] / answers: 1 / hits: 25817 / 9 Years ago, wed, july 15, 2015, 12:00:00

Is it has any way to get value from Select Option as Integer by default ?

from select here

<select id=lesson_per_class >

 <option value=>&nbsp;</option>

 <option value=1>1 Lesson</option>

 <option value=2>2 Lessons</option>

 <option value=3>3 Lessons</option>

 <option value=4>4 Lessons</option>

</select>

When I tried to get their value to calculate, I found that it return as String and can't use to calculate here

var lesson_per_class = $('#lesson_per_class').val();

alert('value is ' + ( 10 + lesson_per_class )); 

// it give result as 10x instead of 1x

currently, the way I solved is parseInt(), but I need to know, is it has anyway to get it as Integer by default?

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turnerf

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4 Years ago

answered 9 Years ago lucianom · Accepted Answer

From the spec you can see the value is a DOMString so no, you cannot get an integer by default.

http://www.w3.org/TR/html5/forms.html#the-option-element

For Java and ECMAScript, DOMString is bound to the String type because
both languages also use UTF-16 as their encoding.

[NamedConstructor=Option(optional DOMString text = , optional DOMString value, optional boolean defaultSelected = false, optional boolean selected = false)]

interface HTMLOptionElement : HTMLElement {

           attribute boolean disabled;

  readonly attribute HTMLFormElement? form;

           attribute DOMString label;

           attribute boolean defaultSelected;

           attribute boolean selected;

           attribute DOMString value;



           attribute DOMString text;

  readonly attribute long index;

};