diff --git a/.all-contributorsrc b/.all-contributorsrc
index 01948560b..38bcc285f 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -343,6 +343,16 @@
       "contributions": [
         "bug"
       ]
+    },
+    {
+      "login": "wayfarer3130",
+      "name": "Bill Wallace",
+      "avatar_url": "https://avatars.githubusercontent.com/u/27778909?v=4",
+      "profile": "https://github.com/wayfarer3130",
+      "contributions": [
+        "code",
+        "doc"
+      ]
     }
   ],
   "contributorsPerLine": 7
diff --git a/README.md b/README.md
index f066fbc14..a3d60ea8f 100755
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@
 <!-- prettier-ignore-start -->
 [![Build Status][build-badge]][build]
 [![Coverage Status][coverage-badge]][coverage]
-[![All Contributors](https://img.shields.io/badge/all_contributors-34-orange.svg?style=flat-square)](#contributors)
+[![All Contributors](https://img.shields.io/badge/all_contributors-35-orange.svg?style=flat-square)](#contributors)
 
 [![NPM version][npm-version-image]][npm-url]
 [![NPM downloads][npm-downloads-image]][npm-url]
@@ -164,7 +164,7 @@ Thanks goes to these people ([emoji key][emojis]):
 | [<img src="https://avatars3.githubusercontent.com/u/2378326?v=4" width="100px;" alt="Gustavo André Lelis"/><br /><sub><b>Gustavo André Lelis</b></sub>](https://github.com/galelis)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=galelis "Code") | [<img src="https://avatars1.githubusercontent.com/u/3926071?v=4" width="100px;" alt="Kofifus"/><br /><sub><b>Kofifus</b></sub>](https://github.com/kofifus)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=kofifus "Code") [🔧](#tool-kofifus "Tools") [🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Akofifus "Bug reports") | [<img src="https://avatars2.githubusercontent.com/u/25580127?v=4" width="100px;" alt="Aloïs Dreyfus"/><br /><sub><b>Aloïs Dreyfus</b></sub>](http://www.linkedin.com/in/alois-dreyfus/)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=adreyfus "Code") | [<img src="https://avatars0.githubusercontent.com/u/616382?v=4" width="100px;" alt="Tim Leslie"/><br /><sub><b>Tim Leslie</b></sub>](http://www.timl.id.au)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=timleslie "Code") | [<img src="https://avatars3.githubusercontent.com/u/7297450?v=4" width="100px;" alt="diego0020"/><br /><sub><b>diego0020</b></sub>](https://github.com/diego0020)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=diego0020 "Code") | [<img src="https://avatars1.githubusercontent.com/u/4920551?v=4" width="100px;" alt="Evren Ozkan"/><br /><sub><b>Evren Ozkan</b></sub>](https://github.com/evren217)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=evren217 "Code") | [<img src="https://avatars2.githubusercontent.com/u/7647745?v=4" width="100px;" alt="Salvador Daniel Pelayo"/><br /><sub><b>Salvador Daniel Pelayo</b></sub>](https://github.com/daniel2101)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=daniel2101 "Code") |
 | [<img src="https://avatars3.githubusercontent.com/u/3358381?v=4" width="100px;" alt="Juan Narvaez"/><br /><sub><b>Juan Narvaez</b></sub>](https://github.com/jdnarvaez)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=jdnarvaez "Code") | [<img src="https://avatars0.githubusercontent.com/u/814227?v=4" width="100px;" alt="Mike"/><br /><sub><b>Mike</b></sub>](https://github.com/mikehazell)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell "Documentation") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell "Code") [⚠️](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mikehazell "Tests") | [<img src="https://avatars2.githubusercontent.com/u/3329885?v=4" width="100px;" alt="Sangkeun Kim"/><br /><sub><b>Sangkeun Kim</b></sub>](http://sisobus.com)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=sisobus "Code") [💬](#question-sisobus "Answering Questions") | [<img src="https://avatars3.githubusercontent.com/u/378021?v=4" width="100px;" alt="Victor Saase"/><br /><sub><b>Victor Saase</b></sub>](https://github.com/vsaase)<br />[🤔](#ideas-vsaase "Ideas, Planning, & Feedback") | [<img src="https://avatars2.githubusercontent.com/u/120943?v=4" width="100px;" alt="Michael Wasser"/><br /><sub><b>Michael Wasser</b></sub>](http://www.mikewasser.com)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=untoldone "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/11068601?v=4" width="100px;" alt="Amandeep Singh"/><br /><sub><b>Amandeep Singh</b></sub>](https://github.com/singhArmani)<br />[🖋](#content-singhArmani "Content") | [<img src="https://avatars0.githubusercontent.com/u/1474137?v=4" width="100px;" alt="Madison Dickson"/><br /><sub><b>Madison Dickson</b></sub>](http://mix3dstudios.com)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mix3d "Documentation") |
 | [<img src="https://avatars1.githubusercontent.com/u/3342530?v=4" width="100px;" alt="Kevin Lee Drum"/><br /><sub><b>Kevin Lee Drum</b></sub>](https://github.com/kevinleedrum)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=kevinleedrum "Code") | [<img src="https://avatars3.githubusercontent.com/u/11224291?v=4" width="100px;" alt="Makarand Bauskar"/><br /><sub><b>Makarand Bauskar</b></sub>](https://github.com/mmbauskar)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=mbauskar "Code") | [<img src="https://avatars0.githubusercontent.com/u/1713255?v=4" width="100px;" alt="Biharck Araujo"/><br /><sub><b>Biharck Araujo</b></sub>](http://www.biharck.com.br)<br />[💡](#example-biharck "Examples") [📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=biharck "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/5349517?v=4" width="100px;" alt="Devon Bernard"/><br /><sub><b>Devon Bernard</b></sub>](https://www.linkedin.com/in/devonbernard)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=DevonBernard "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/38315992?v=4" width="100px;" alt="Karl-Heinrich"/><br /><sub><b>Karl-Heinrich</b></sub>](https://github.com/Karl-Heinrich)<br />[🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3AKarl-Heinrich "Bug reports") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=Karl-Heinrich "Code") [⚠️](https://github.com/cornerstonejs/cornerstoneTools/commits?author=Karl-Heinrich "Tests") | [<img src="https://avatars0.githubusercontent.com/u/15172026?v=4" width="100px;" alt="counterxing"/><br /><sub><b>counterxing</b></sub>](https://blog.xingbofeng.com/)<br />[🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Axingbofeng "Bug reports") [💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=xingbofeng "Code") | [<img src="https://avatars0.githubusercontent.com/u/50026015?v=4" width="100px;" alt="Jorge Lopes"/><br /><sub><b>Jorge Lopes</b></sub>](https://github.com/jlopes90)<br />[💬](#question-jlopes90 "Answering Questions") |
-| [<img src="https://avatars2.githubusercontent.com/u/5546851?v=4" width="100px;" alt="Gabriel Garrido"/><br /><sub><b>Gabriel Garrido</b></sub>](http://garrido.io)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=Ggpsv "Code") | [<img src="https://avatars0.githubusercontent.com/u/4126256?v=4" width="100px;" alt="ASVBPREAUBV"/><br /><sub><b>ASVBPREAUBV</b></sub>](https://github.com/ASVBPREAUBV)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=ASVBPREAUBV "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/50960211?v=4" width="100px;" alt="frolic06"/><br /><sub><b>frolic06</b></sub>](https://github.com/frolic06)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=frolic06 "Code") | [<img src="https://avatars2.githubusercontent.com/u/26968918?v=4" width="100px;" alt="codepage949"/><br /><sub><b>codepage949</b></sub>](https://github.com/codepage949)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=codepage949 "Code") | [<img src="https://avatars.githubusercontent.com/u/1915?v=4" width="100px;" alt="Asherah Connor"/><br /><sub><b>Asherah Connor</b></sub>](https://kivikakk.ee)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=kivikakk "Code") | [<img src="https://avatars.githubusercontent.com/u/22633385?v=4" width="100px;" alt="Ikko Ashimine"/><br /><sub><b>Ikko Ashimine</b></sub>](https://bandism.net/)<br />[🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Aeltociear "Bug reports") |
+| [<img src="https://avatars2.githubusercontent.com/u/5546851?v=4" width="100px;" alt="Gabriel Garrido"/><br /><sub><b>Gabriel Garrido</b></sub>](http://garrido.io)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=Ggpsv "Code") | [<img src="https://avatars0.githubusercontent.com/u/4126256?v=4" width="100px;" alt="ASVBPREAUBV"/><br /><sub><b>ASVBPREAUBV</b></sub>](https://github.com/ASVBPREAUBV)<br />[📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=ASVBPREAUBV "Documentation") | [<img src="https://avatars0.githubusercontent.com/u/50960211?v=4" width="100px;" alt="frolic06"/><br /><sub><b>frolic06</b></sub>](https://github.com/frolic06)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=frolic06 "Code") | [<img src="https://avatars2.githubusercontent.com/u/26968918?v=4" width="100px;" alt="codepage949"/><br /><sub><b>codepage949</b></sub>](https://github.com/codepage949)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=codepage949 "Code") | [<img src="https://avatars.githubusercontent.com/u/1915?v=4" width="100px;" alt="Asherah Connor"/><br /><sub><b>Asherah Connor</b></sub>](https://kivikakk.ee)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=kivikakk "Code") | [<img src="https://avatars.githubusercontent.com/u/22633385?v=4" width="100px;" alt="Ikko Ashimine"/><br /><sub><b>Ikko Ashimine</b></sub>](https://bandism.net/)<br />[🐛](https://github.com/cornerstonejs/cornerstoneTools/issues?q=author%3Aeltociear "Bug reports") | [<img src="https://avatars.githubusercontent.com/u/27778909?v=4" width="100px;" alt="Bill Wallace"/><br /><sub><b>Bill Wallace</b></sub>](https://github.com/wayfarer3130)<br />[💻](https://github.com/cornerstonejs/cornerstoneTools/commits?author=wayfarer3130 "Code") [📖](https://github.com/cornerstonejs/cornerstoneTools/commits?author=wayfarer3130 "Documentation") |
 <!-- ALL-CONTRIBUTORS-LIST:END -->
 
 This project follows the [all-contributors][all-contributors] specification.
diff --git a/src/stackTools/stackPrefetch.js b/src/stackTools/stackPrefetch.js
index ebab9df84..44188948b 100755
--- a/src/stackTools/stackPrefetch.js
+++ b/src/stackTools/stackPrefetch.js
@@ -40,32 +40,20 @@ function range(lowEnd, highEnd) {
   return arr;
 }
 
-const max = function(arr) {
-  return Math.max.apply(null, arr);
-};
-
-const min = function(arr) {
-  return Math.min.apply(null, arr);
-};
-
 function nearestIndex(arr, x) {
   // Return index of nearest values in array
   // http://stackoverflow.com/questions/25854212/return-index-of-nearest-values-in-an-array
-  const l = [];
-  const h = [];
-
-  arr.forEach(function(v) {
+  let low = 0;
+  let high = arr.length - 1;
+  arr.forEach((v, idx) => {
     if (v < x) {
-      l.push(v);
+      low = Math.max(idx, low);
     } else if (v > x) {
-      h.push(v);
+      high = Math.min(idx, high);
     }
   });
 
-  return {
-    low: arr.indexOf(max(l)),
-    high: arr.indexOf(min(h)),
-  };
+  return { low, high };
 }
 
 function prefetch(element) {
diff --git a/src/util/uuidv4.js b/src/util/uuidv4.js
index aa9d2f7ce..19ddd7433 100644
--- a/src/util/uuidv4.js
+++ b/src/util/uuidv4.js
@@ -1,7 +1,7 @@
 export default function uuidv4() {
   return 'xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx'.replace(/[xy]/g, function(c) {
-    let r = (Math.random() * 16) | 0,
-      v = c == 'x' ? r : (r & 0x3) | 0x8;
+    const r = (Math.random() * 16) | 0; // eslint-disable-line no-bitwise
+    const v = c === 'x' ? r : (r & 0x3) | 0x8; // eslint-disable-line no-bitwise
 
     return v.toString(16);
   });