javascript - html range slider, click change only one value -


i have range slider this:

<input id="wykup-koncowy" class="range-slider" type="range" max="2" min="0" value="0" real-value="1">

and in js/jq control values on input. when grab slider , move every works perfect, need when click value +1 or -1, example:

input have value = 0, click value = 2, input have value = 1

ex2: input have value = 2, click value = 1, input have value = 1

ex3: input have value = 2, click value = 0, input have value = 1

i try add wykup_point , wykup_point_val variable cache values not works. js view this:

var kwota = $('#wartosc-przedmiotu'),     wykup_koncowy_kwota = 0,     wplata_wlasna_kwota = 0,     wykup_point = 0,     wykup_point_val = 0 ;  jquery(function($){      wykup_point_val = $('#wykup-koncowy').val();  })   const available_values = [1, 5, 10];  const max = available_values.length - 1,   min = 0;    wykup_koncowy_kwota = r1(kwota.val() - kwota.val()*((100-available_values[min])/100)); var output = $('.wykup-koncowy-text').text(available_values[min]+'% ('+wykup_koncowy_kwota+' pln)');  $(function() {      $('#wykup-koncowy').click(function(e){         // e.preventdefault();          if($(this).val() > wykup_point_val){              wykup_point_val++;             wykup_point = $(this).val(wykup_point_val);              var hodnota = parseint(wykup_point_val, 10);             $(this).attr('real-value', available_values[hodnota]);          }else{              wykup_point_val--;             wykup_point = $(this).val(wykup_point_val);              var hodnota = parseint(wykup_point_val, 10);             $(this).attr('real-value', available_values[hodnota]);          }          wykup_koncowy_kwota = r1(kwota.val() - kwota.val()*((100-$(this).attr('real-value'))/100));         output.text($(this).attr('real-value')+'% ('+wykup_koncowy_kwota+' pln)');      })    $('#wykup-koncowy').on('input', function(event) {     var hodnota = parseint($(this).val(), 10);     $(this).attr('real-value', available_values[hodnota]);     wykup_koncowy_kwota = r1(kwota.val() - kwota.val()*((100-$(this).attr('real-value'))/100));     output.text($(this).attr('real-value')+'% ('+wykup_koncowy_kwota+' pln)');   });    });  $(".range-slider")   .attr({     'max': max,     'min': min,     'value': string(min),     'real-value': available_values[0]   });


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