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jQuery check if element has a class beginning with some string

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面向向阳花
面向向阳花 2021-02-02 00:52

I need to loop through some elements in the page and then, for each one, if it had a class beginning with, for example, \"C\", do something. 

$(\'#dialog li\').e
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  • 花落未央
    花落未央 (楼主)
    2021-02-02 01:07

    Carefull with $('#dialog li[class^="C"]')! It will only match elements, whose class attribute starts with "C" not ones with a class starting with C. For example it will not match

  • .

    AFAIK what you want is not possible mit jQuery alone. You would need to loop through the classes and check each separatly. Something like:

    $('#dialog li').filter(function(){
  var classes = this.className.split(/\s/);
  for (var i = 0, len = classes.length; i < len; i++) 
    if (/^C/.test(classes[i])) return true;
  return false;
}).each( ... )

    Alternativly you should consider changing your approach, and give all elements an additional class and filter by that. This has the addvantage that it can also be used in CSS:

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