jQuery selectors with variables

问题:

How to mix variables with selectors?

I have ID variable.

I want to select image with this id from div #one.

jQuery(\'#one img .id\') is the selector. I\'ve tried $(\'#one img .\'+id) but doesn\'t work.

回答1:

Edit: Based on your comment below, you would use this:

$(\'#one img.\'+id)

In your question you have a space between img and the .class, I\'ve simply removed that so you get img.className or img.\'+className

回答2:

This might just be a typo or you actually use the id variable in a class, but maybe it should be:

jQuery(\'#one img #\'+id)

回答3:

. is a class selector. Try changing that to a #:

$(\'#one img #\'+id)

回答4:

ID\'s should be unique in your HTML. So you should be able to select the ID directly without worrying about which DIV it is in. Since you mention the ID is attached to the img tag, then this should be enough.

$(\'#\' + id);

回答5:

Maybe you want to select img which set with specific class and save this class into id variable within div element with id=\'one\'.

DEMO

In demo i select img element, clone it, and append to div id=one.