javascript - Increase and decrease jQuery slider ui value by one step -


i've created slider displays value based on specified array. want increase or decrease value 1 step using 'plus/minus' buttons seems working value not updating.

https://jsfiddle.net/martynava/jrx8rz79/6/

slider input field , increase/decrease buttons

code below:

$(function() {  var sizes = [ "10", "20", "30", "40", "50", "60", "70", "80", "90", "100", "200", "300", "400", "500", "1000" ];  $("#slider-range-max").slider({    range: "max",    min: 0,    max: sizes.length - 1,    step: 1,    slide: function(event, ui) {      $("#cap").val(sizes[ui.value]);    }  });  $( "#cap" ).val( $( "#slider-range-max" ).slider( "value" ) + ' tb' );  });      $("#plus1").click(function() {      var value = $("#slider-range-max").slider("value")          , step = $("#slider-range-max").slider("option", "step");        $("#slider-range-max").slider("value", value + step);  });    $("#minus1").click(function () {      var value = $("#slider-range-max").slider("value")          , step = $("#slider-range-max").slider("option", "step");        $("#slider-range-max").slider("value", value - step);          });

does know best way make work. thank in advance

there errors in code instance click events must inside document ready otherwise need use document on event listener. looking is:

$(function () {    var sizes = ["10", "20", "30", "40", "50", "60", "70", "80", "90", "100", "200", "300", "400", "500", "1000"];    $("#slider-range-max").slider({      range: "max",      min: 0,      max: sizes.length - 1,      step: 1,      create: function(event, ui) {        $("#cap").val(sizes[0] + ' tb');      },      change: function (event, ui) {        $("#cap").val(sizes[ui.value] + ' tb');      }    });      $("#plus1").click(function () {      var value = $("#slider-range-max").slider("value");      var step = $("#slider-range-max").slider("option", "step");        $("#slider-range-max").slider("value", value + step);    });      $("#minus1").click(function () {      var value = $("#slider-range-max").slider("value")      var step = $("#slider-range-max").slider("option", "step");        $("#slider-range-max").slider("value", value - step);    });  });
.slider {    position: relative;    margin-top: 20px;    margin-bottom: 15px;    width: 90%;    background: #2a3137;    /* -moz-box-shadow: inset 0 0 10px #999;    -webkit-box-shadow: inset 0 0 10px #999;    box-shadow: inset 0 0 10px #999;*/    height: 15px;    border-radius: 10px;    border: 1px solid #dddddd;    margin-left: 15px;  }    .slider .ui-slider-handle {    position: absolute;    background: #10a447;    border-radius: 5px;    width: 20px;    height: 50px;    top: -16px;    left: 50px;    border-style: none;    box-shadow: none;    }    input[type=text] {    border: 1px solid #10a447;    -webkit-border-radius: 5px;    -moz-border-radius: 5px;    border-radius: 5px;    padding: 5px 10px;    margin-top: -15px;    text-align: center;    background-color: #ffffff;    width: 120px;    color: #2a3137;    font-size: 18px;    font-weight: bold;    margin-top: 5px;    margin-left: 5px;  }    .minus, .plus {    display: inline-block;    float: left;    border: 1px solid #aaa;    -webkit-border-radius: 5px;    -moz-border-radius: 5px;    border-radius: 5px;    padding: 5px 10px;    margin-top: -15px;    text-align: center;    background-color: #e3e3e3;    color: #333;    font-size: 18px;    font-weight: bold;    margin-left: 5px;    cursor: pointer;    width: 10px;    margin-top: 5px;  }
<link href="http://code.jquery.com/ui/1.11.3/themes/smoothness/jquery-ui.css" rel="stylesheet"/>  <script src="http://code.jquery.com/jquery-1.11.3.min.js"></script>  <script src="http://code.jquery.com/ui/1.11.3/jquery-ui.js"></script>      <div id="quote-input" class="slider-input">      <div id="minus1" class="minus"><span>-</span></div>      <div id="plus1" class="plus">+</div>      <input type="text" id="cap" class="slider-value">          <div id="slider-range-max" class="slider">          <span class="ui-slider-handle"></span>      </div>  </div>


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