Problem when filtering a selection with jQuery

$("[title != '' ]").each(function(){开发者_运维知识库
    $(this).addClass('lkBox');
});

I´ve been programming some stuffs in my job and i used to filter empty title elements by the script over this text. Is it correctly? I tested in my localserver with a simple HTML page that i mounted and everthing was ok.

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Yes it is correct. You are using the Not Equal Selector

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The only difference between your example and jQuery documentation is that they switch the single quotes and double quotes, and they don't have spaces, so try this:

$('[title!=""]').each(function(){
    $(this).addClass('lkBox');
});

Alternatively, check that the titles on the page it is not working on are actually empty.

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If you don't have a place to test (your website etc.), use online resources like jsfiddle, there you can do simple examples and see if it worked