如何使用jQuery从某些（多个）类中获取所有元素？

Question

I want to get all fields that have this class: "requiredField Validate".

Code sample:

<form id="myForm">
<input type="text" class="requiredField X"> Text1
<input type="text" class="requiredField Y"> Text2
<input type="text" class="requiredField Validate"> Text3
<input type="text" class="requiredField Validate"> Text4
<input type="text" class="requiredField Z"> Text5
</form>

How can I do this using jQuery?

I tried to do this and had no success:

$('.requiredField.Validate').each(function() {...
$('form.myForm.Validate')
$('.requiredField Validate')

Answer 1

You can do it this way,

Live demo

$('.requiredField.Validate')

Answer 2

Try this

$('.requiredField.Validate'); // Will select elements that has both classes.

Here is an example , see the console.

Answer 3

试试这个：

$('.requiredField').filter('.Validate');

Answer 4

Just as in CSS

$('.requiredField .Validate')

which means every .Validate concerning .requiredField is true

In difference

$('.requiredField, .Validate') 

which means .Validate or .requiredField .