Simplified expression that was potentially unsafe for minification

dist/rzslider.css

 /*! angularjs-slider - v2.8.0 - 
  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-02-08 */
+ 2016-02-09 */
 rzslider {
   position: relative;
   display: inline-block;

dist/rzslider.js

 /*! angularjs-slider - v2.8.0 - 
  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> - 
  https://github.com/angular-slider/angularjs-slider - 
- 2016-02-08 */
+ 2016-02-09 */
 /*jslint unparam: true */
 /*global angular: false, console: false, define, module */
 (function(root, factory) {
@@ -1075,8 +1075,8 @@
        */
       roundStep: function(value) {
         var steppedDifference = parseFloat((value - this.minValue) / this.step).toPrecision(12);
-        steppedDifference = Math.round(+steppedDifference) * this.step;
-        var newValue = (this.minValue + (+steppedDifference)).toFixed(this.precision);
+        steppedDifference = Math.round(steppedDifference) * this.step;
+        var newValue = (this.minValue + steppedDifference).toFixed(this.precision);
         return +newValue;
       },
 

dist/rzslider.min.css

-/*! angularjs-slider - v2.8.0 -  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> -  https://github.com/angular-slider/angularjs-slider -  2016-02-08 */
+/*! angularjs-slider - v2.8.0 -  (c) Rafal Zajac <rzajac@gmail.com>, Valentin Hervieu <valentin@hervieu.me>, Jussi Saarivirta <jusasi@gmail.com>, Angelin Sirbu <angelin.sirbu@gmail.com> -  https://github.com/angular-slider/angularjs-slider -  2016-02-09 */
 rzslider{position:relative;display:inline-block;width:100%;height:4px;margin:35px 0 15px 0;vertical-align:middle;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none}rzslider[disabled]{cursor:not-allowed}rzslider[disabled] .rz-pointer{cursor:not-allowed;background-color:#d8e0f3}rzslider span{position:absolute;display:inline-block;white-space:nowrap}rzslider .rz-base{width:100%;height:100%;padding:0}rzslider .rz-bar-wrapper{left:0;z-index:1;width:100%;height:32px;padding-top:16px;margin-top:-16px;box-sizing:border-box}rzslider .rz-bar-wrapper.rz-draggable{cursor:move}rzslider .rz-bar{left:0;z-index:1;width:100%;height:4px;background:#d8e0f3;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider .rz-bar.rz-selection{z-index:2;background:#0db9f0;-webkit-border-radius:2px;-moz-border-radius:2px;border-radius:2px}rzslider .rz-pointer{top:-14px;z-index:3;width:32px;height:32px;cursor:pointer;background-color:#0db9f0;-webkit-border-radius:16px;-moz-border-radius:16px;border-radius:16px}rzslider .rz-pointer:after{position:absolute;top:12px;left:12px;width:8px;height:8px;background:#fff;-webkit-border-radius:4px;-moz-border-radius:4px;border-radius:4px;content:''}rzslider .rz-pointer:hover:after{background-color:#fff}rzslider .rz-pointer.rz-active{z-index:4}rzslider .rz-pointer.rz-active:after{background-color:#451aff}rzslider .rz-bubble{bottom:16px;padding:1px 3px;color:#55637d;cursor:default}rzslider .rz-bubble.rz-selection{top:16px}rzslider .rz-bubble.rz-limit{color:#55637d}rzslider .rz-ticks{position:absolute;top:-3px;left:0;z-index:1;display:-webkit-flex;display:-ms-flexbox;display:flex;width:100%;height:0;padding:0 11px;margin:0;list-style:none;box-sizing:border-box;-webkit-justify-content:space-between;-ms-flex-pack:justify;justify-content:space-between}rzslider .rz-ticks .tick{width:10px;height:10px;text-align:center;cursor:pointer;background:#d8e0f3;border-radius:50%}rzslider .rz-ticks .tick.selected{background:#0db9f0}rzslider .rz-ticks .tick .tick-value{position:absolute;top:-30px;transform:translate(-50%,0)}rzslider.vertical{position:relative;width:4px;height:100%;padding:0;margin:0 20px;vertical-align:baseline}rzslider.vertical .rz-base{width:100%;height:100%;padding:0}rzslider.vertical .rz-bar-wrapper{top:auto;left:0;width:32px;height:100%;padding:0 0 0 16px;margin:0 0 0 -16px}rzslider.vertical .rz-bar{bottom:0;left:auto;width:4px;height:100%}rzslider.vertical .rz-pointer{top:auto;bottom:0;left:-14px!important}rzslider.vertical .rz-bubble{bottom:0;left:16px!important;margin-left:3px}rzslider.vertical .rz-bubble.rz-selection{top:auto;left:16px!important}rzslider.vertical .rz-ticks{top:0;left:-3px;z-index:1;width:0;height:100%;padding:11px 0;-webkit-flex-direction:column-reverse;-ms-flex-direction:column-reverse;flex-direction:column-reverse}rzslider.vertical .rz-ticks .tick{vertical-align:middle}rzslider.vertical .rz-ticks .tick .tick-value{top:auto;right:-30px;transform:translate(0,-28%)}
\ No newline at end of file

src/rzslider.js

@@ -1079,8 +1079,8 @@
        */
       roundStep: function(value) {
         var steppedDifference = parseFloat((value - this.minValue) / this.step).toPrecision(12);
-        steppedDifference = Math.round(+steppedDifference) * this.step;
-        var newValue = (this.minValue + (+steppedDifference)).toFixed(this.precision);
+        steppedDifference = Math.round(steppedDifference) * this.step;
+        var newValue = (this.minValue + steppedDifference).toFixed(this.precision);
         return +newValue;
       },