Jörn Zaefferer wrote:
> Currently val() is only a shortcut, but doesn't encapsulate anything useful.
> It would be nice to have it handling some more stuff.
>
> I wouldn't like to have it in an external plugin, that makes it difficult to
> access or find it when you actually need that functionality.
>
> Some thoughts about the implementation:
> - single select: Nothing to worry about, right?
> - multiple select: Get it's option:selected children and put their values
> into an array, empty array when nothing is selected
> - radio: Find the input:radio siblings with the same name and get the value
> from the one that is checked, ??? when nothing is selected
> - checkbox: combination of radio and select: Find input:checkbox siblings
> that are checked and put their values into an array, empty array when nothing
> is checked
> - everything else: stick to the simple value
As a start, heres what I use:
(It doesn't cover radio buttons as described above
- as I never needed it)
It returns an array of values if the jquery has several elements,
it maybe more useful to return an object (id/name => value) instead.
$.fn.getValue = function() {
var o = [];
this.each(function() {
switch (this.type) {
case 'checkbox':
case 'radio':
v = this.checked;
break;
case 'select-one':
v = this.selectedIndex >= 0
? (this.options[this.selectedIndex].value
|| this.options[this.selectedIndex].text)
: null;
break;
case 'select-multiple':
v = [];
for (var i = 0; i < this.options.length; i++) {
if (this.options[i].selected)
v.push(this.options[i].value ||
this.options[i].text);
}
break;
case 'button':
case 'reset':
case 'submit':
break;
default:
v = this.value;
}
o.push(v);
});
return o.length > 1 ? o : o[0];
};
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