jQuery 判断是否包含某个属性

1、Get the attribute, check the value

var attr = $(this).attr('name');
 
// For some browsers, `attr` is undefined; for others, `attr` is false. Check for both.
if (typeof attr !== typeof undefined && attr !== false) {
  // Element has this attribute
}

2、Native JavaScript has a way

$(this)[0].hasAttribute("name");
 
jQObject[0].hasAttribute("name");

3、Filter the selection

$(this).is('[name]');
 
$(this).filter("[name='choice']");