要获取不匹配"，您可以使用具有属性选择器，如下所示:

To get a "doesn't match", you'd use an attribute not-equals selector with (the other part of the question) as has-attribute selector, like this:

$("span[a][a!='4']")

如果您希望它等于，只需取出!以获得属性等于选择器，如下所示:

If you want it to equal, just take out the ! for an attribute-equals selector, like this:

$("span[a][a='5']")

要使用变量，只需将其连接起来，就像这样:

To use a variable, just concatenate, like this:

$("span[" + my_attr + "][" + my_attr + "!='" + my_value + "']")