javascript - Using custom attribute jQuery selectors with dropdown select (take 2) -

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this issue making me want smash computer. have form, want calculate values selections on form. have 2 jsfiddles here, want have can make selections, calculate on click. can't form work on click. other fiddle uses on change , keyup functions. there issue on form well. if change first select "option 2", you'll see value select ends being "1.379999999996" instead of "1.38". why happening?

fiddle click function js: 

$('#submit').click(function(){     var price=$(this).find("option:selected").attr('data-price');         var ink=$('#ink').val();        var loc1=$('#loc1').val();     var res= price*1 + ink*1 + loc1*1 ;      $('#bleh').val( res || 0 ); });

fiddle change , keyup functions js:

$('#ink, #loc1, .sel').on('keyup change',function(){     var price=$('option:selected', this).attr('data-price');     var ink=$('#ink').val();        var loc1=$('#loc1').val();         var res= price*1 + ink*1 + loc1*1 ;      $('#bleh').val( res || 0 ); });

your selector $(this).find("option:selected") wrong this here points #submit button, need find out select element using id #style

$('#submit').click(function(){     var price=$('#style').find("option:selected").attr('data-price');         var ink=$('#ink').val();        var loc1=$('#loc1').val();     var res= price*1 + ink*1 + loc1*1 ;      $('#bleh').val( res || 0 ); });

demo: fiddle


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