jquery - Check if a div has all four classes -


basically filter wordpress.

all posts shown in 1 page , have added category names classes main div (.box) of post 1 div have multiple classes.

there fours drop downs in filter widget categories listed options.

i wanted show div has active category names classes.

following code. if condition, how can use idea of "and"?

this code gives me error.

$('#filter select').change(function()     {             var upper=$('#upper').val();             var sole=$('#sole').val();             var toe=$('#toe').val();             var midsole=$('#midsole').val();              $('.box').each(function()             {                  if($(this).hasclass(upper) && hasclass(sole) && hasclass(toe) && hasclass(midsole))                 {                     $(this).show();                 }                 else{                     $(this).hide();                 }     });  });

you can use $.fn.filter method combined class selected:

$('#filter select').change(function () {     var upper = $('#upper').val();     var sole = $('#sole').val();     var toe = $('#toe').val();     var midsole = $('#midsole').val();      var classes = '.' + [upper, sole, toe, midsole].join('.');     $('.box').hide().filter(classes).show(); });

basically, construction '.' + [upper, sole, toe, midsole].join('.') produces string of 4 classes concatenated . character: .class1.class2.class3.class4, css selector .box element having 4 classes @ same time.


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