diff --git a/.eslintrc.js b/.eslintrc.js
index a1e07b0..b483a62 100644
--- a/.eslintrc.js
+++ b/.eslintrc.js
@@ -20,6 +20,7 @@ module.exports = {
     'func-style': ['error', 'declaration', { allowArrowFunctions: true }],
     'no-use-before-define': ['error', { functions: false }],
     '@typescript-eslint/no-use-before-define': ['error', { functions: false }],
+    'consistent-return': 1
   },
   settings: {
     'import/resolver': {
diff --git a/package.json b/package.json
index 82ea695..8b978c7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "wetty",
-  "version": "1.1.8",
+  "version": "1.1.9",
   "description": "WeTTY = Web + TTY. Terminal access in browser over http/https",
   "homepage": "https://github.com/krishnasrinivas/wetty",
   "repository": {
@@ -47,7 +47,7 @@
       "*.json"
     ]
   },
-  "preferGlobal": "true",
+  "preferGlobal": true,
   "dependencies": {
     "compression": "^1.7.4",
     "express": "^4.17.1",
diff --git a/src/client/copyToClipboard.ts b/src/client/copyToClipboard.ts
new file mode 100644
index 0000000..4b8e608
--- /dev/null
+++ b/src/client/copyToClipboard.ts
@@ -0,0 +1,22 @@
+// NOTE text selection on double click or select
+const copyToClipboard = (text: string) : any => {
+    if (window.clipboardData && window.clipboardData.setData) {
+        return window.clipboardData.setData("Text", text);
+    } if (document.queryCommandSupported && document.queryCommandSupported("copy")) {
+        const textarea = document.createElement("textarea");
+        textarea.textContent = text;
+        textarea.style.position = "fixed";
+        document.body.appendChild(textarea);
+        textarea.select();
+        try {
+            return document.execCommand("copy");
+        } catch (ex) {
+            console.warn("Copy to clipboard failed.", ex);
+            return false;
+        } finally {
+            document.body.removeChild(textarea);
+        }
+    }
+}
+
+export default copyToClipboard;
\ No newline at end of file
diff --git a/src/client/index.ts b/src/client/index.ts
index a17e107..a0026fd 100644
--- a/src/client/index.ts
+++ b/src/client/index.ts
@@ -4,6 +4,8 @@ import * as io from 'socket.io-client';
 import { fit } from 'xterm/lib/addons/fit/fit';
 import * as fileType from 'file-type';
 import Toastify from 'toastify-js';
+
+import copyToClipboard from "./copyToClipboard";
 import './wetty.scss';
 import './favicon.ico';
 
@@ -17,27 +19,6 @@ const socket = io(window.location.origin, {
 const FILE_BEGIN = '\u001b[5i';
 const FILE_END = '\u001b[4i';
 
-//NOTE text selection on double click or select
-const copyToClipboard = (text: string) => {
-  if (window.clipboardData && window.clipboardData.setData) {
-    return clipboardData.setData("Text", text);
-  } else if (document.queryCommandSupported && document.queryCommandSupported("copy")) {
-    let textarea = document.createElement("textarea");
-    textarea.textContent = text;
-    textarea.style.position = "fixed";
-    document.body.appendChild(textarea);
-    textarea.select();
-    try {
-      return document.execCommand("copy");
-    } catch (ex) {
-      console.warn("Copy to clipboard failed.", ex);
-      return false;
-    } finally {
-      document.body.removeChild(textarea);
-    }
-  }
-}
-
 socket.on('connect', () => {
   const term = new Terminal();
   let fileBuffer = [];
@@ -100,9 +81,9 @@ socket.on('connect', () => {
     return true;
   });
 
-  //NOTE copytoclipboard
+  // NOTE copytoclipboard
   document.addEventListener('mouseup', () => {
-    if (term.hasSelection()) 
+    if (term.hasSelection())
       copyToClipboard(term.getSelection())
   }, false);