jQuery：查找所有可见的必填字段
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jQuery: Find all the visible required fields
提问by Himanshu Yadav
I am trying to find all the fields with requiredattribute and they should be visibletoo. Because page can have hidden required fields too. Here is what I tried:
我试图找到所有具有required属性的字段，它们也应该visible如此。因为页面也可以隐藏必填字段。这是我尝试过的：
function validateRequiredFields()
{
$('input,textarea,select').attr('required',true).filter(':visible:first').each(function(i, requiredField){
if($(requiredField).val()=='')
{
alert($(requiredField).attr('name'));
}
});
}
回答by Arun P Johny
If you want to find input, textarea,or select elements that have the attribute requiredand are visibleuse the has attribute selector:
如果要查找具有属性required并visible使用has 属性选择器的input、textarea 或 select 元素：
$('input,textarea,select').filter('[required]:visible')
or
或者
$(':input[required]:visible')//might be little costlier
