Question

I want check between a tag if empty was between it append a text, How is it?

Example: if empty was between tag <span></span> append phrase There is not between .exist.

Answer 1

This will put the text in the span element.

 $("span:empty").text("There is not!")

To check if empty and put the text in different element use:

if ($("span:empty").length != 0) {
    $('.empty').text("There is not!")
}

example 1

if ($('span:empty').length != 0) {
    $('.exist').show().html($('<b/>').text('There is not').wrap($('<p/>')));
}

example 2