reset value of multiple (but not all) form fields

问题:

Is it possible to reset multiple form fields in one line, or one hit, with jQuery. Note: I don't want to reset all form fields, only a specified whitelist (as below):

// reset some form fields                       
$('#address11').val('');
$('#address21').val('');
$('#town1').val('');
$('#county1').val('');
$('#postcode1').val('');

回答1:

jQuery (and CSS) selector strings can contain multiple selectors using a comma as a delimiter for sub-selectors:

$('#address11, #address21, #town1, #county1, #postcode1').val('');

I'd argue that this is faster than using a class (ID look-ups should perform in essentially constant time, whereas a class look-up will have to visit every DOM node), but perhaps less maintainable if you're going to want to change which elements get reset.

回答2:

It is better to use a class so you do not have to maintain a long list of ids.

HTML

<input type="text" class="resetThis" id="address11" />
<input type="text" class="resetThis" id="address21" />

JavaScript

$(".resetThis").val("");

回答3:

If you have a lot of fields i'd label the ones you want to ignore with a class to minimise code:

$('#myForm input:not(.ignore)').val('');

回答4:

You can use $('#Form_name select:not(.fixed)').val('');