diff --git a/src/sliceActions/helpers/GCode.js b/src/sliceActions/helpers/GCode.js
index f41e3b5..aa7a04f 100644
--- a/src/sliceActions/helpers/GCode.js
+++ b/src/sliceActions/helpers/GCode.js
@@ -38,7 +38,7 @@ export default class GCode {
   turnFanOn(fanSpeed) {
     this._isFanOn = true;
 
-    const gcode = { [M_COMMAND]: 106 }
+    const gcode = { [M_COMMAND]: 106 };
     if (typeof fanSpeed !== 'undefined') gcode[FAN_SPEED] = fanSpeed;
 
     this._addGCode(gcode);
diff --git a/src/sliceActions/slice.js b/src/sliceActions/slice.js
index c51582f..e56b678 100644
--- a/src/sliceActions/slice.js
+++ b/src/sliceActions/slice.js
@@ -14,19 +14,11 @@ import { hslToRgb } from './helpers/color.js';
 // // import removePrecision from './removePrecision.js';
 
 export default function(settings, geometry, openObjectIndexes, constructLinePreview, onProgress) {
-  const totalStages = 11;
-  let current = -1;
-  const updateProgress = (action) => {
-    current ++;
-    if (typeof onProgress !== 'undefined') {
-      onProgress({
-        progress: {
-          done: current,
-          total: totalStages,
-          action
-        }
-      });
-    }
+  const total = 11;
+  let done = -1;
+  const updateProgress = action => {
+    done ++;
+    if (onProgress) onProgress({ progress: { done, total, action } });
   };
 
   updateProgress('Constructing unique lines from geometry');
@@ -70,9 +62,9 @@ export default function(settings, geometry, openObjectIndexes, constructLinePrev
   return gcode;
 }
 
-const PRECISION_INVERSE = 1000;
+const PRECISION = 1000;
 function toFixedTrimmed(value) {
-  return (Math.round(value * PRECISION_INVERSE) / PRECISION_INVERSE).toString();
+  return (Math.round(value * PRECISION) / PRECISION).toString();
 }
 
 function gcodeToString(gcode) {
diff --git a/src/slicer.js b/src/slicer.js
index b651aec..0f77d18 100644
--- a/src/slicer.js
+++ b/src/slicer.js
@@ -96,9 +96,7 @@ function sliceAsync(settings, geometry, openObjectIndexes, constructLinePreview,
           break;
         }
         case 'PROGRESS': {
-          if (typeof onProgress !== 'undefined') {
-            onProgress(data);
-          }
+          if (typeof onProgress !== 'undefined') onProgress(data);
           break;
         }
       }