diff --git a/package.json b/package.json
index 1165350..38d39a1 100644
--- a/package.json
+++ b/package.json
@@ -7,11 +7,10 @@
   "repository": "https://github.com/xenkuo/comNG",
   "main": "src/main.js",
   "scripts": {
-    "prestart": "terser src/base.js src/editor.js src/serialport.js --source-map -o src/index.js -c -m toplevel",
     "start": "electron-forge start",
     "rebuild": "electron-rebuild -f -w serialport",
     "package": "electron-forge package",
-    "premake": "terser src/base.js src/editor.js src/serialport.js --source-map -o src/index.js -c -m toplevel",
+    "premake": "rm src/index.js.map && terser src/base.js src/editor.js src/serialport.js -o src/index.js -c -m",
     "make": "electron-forge make",
     "publish": "electron-forge publish",
     "lint": "echo \"No linting configured\""
diff --git a/src/base.js b/src/base.js
index 9466314..5555cc8 100755
--- a/src/base.js
+++ b/src/base.js
@@ -6,8 +6,8 @@ const appVersion = remote.app.getVersion();
 const appUpdaterUrl =
   "https://gitee.com/api/v5/repos/xenkuo/comNG/releases/latest";
 
-var M = require("materialize-css");
-M.AutoInit();
+var mcss = require("materialize-css");
+mcss.AutoInit();
 
 var config;
 var barHeight;
@@ -139,14 +139,14 @@ window.onload = () => {
     menu.offsetHeight +
     "px";
 
-  M.Tabs.getInstance(document.getElementById("menu-tabs")).select(
+  mcss.Tabs.getInstance(document.getElementById("menu-tabs")).select(
     config.menu.tab
   );
 
   let baudSelect = document.getElementById("baud-select");
   baudSelect.options[0].text = config.general.customized;
   baudSelect.selectedIndex = config.baudIndex;
-  M.FormSelect.init(baudSelect);
+  mcss.FormSelect.init(baudSelect);
 
   portUpdate();
 
@@ -164,16 +164,16 @@ window.onload = () => {
 
   let databits = document.getElementById("databits-select");
   databits.selectedIndex = config.general.databitsIndex;
-  M.FormSelect.init(databits);
+  mcss.FormSelect.init(databits);
   let parity = document.getElementById("parity-select");
   parity.selectedIndex = config.general.parityIndex;
-  M.FormSelect.init(parity);
+  mcss.FormSelect.init(parity);
   let stopbits = document.getElementById("stopbits-select");
   stopbits.selectedIndex = config.general.stopbitsIndex;
-  M.FormSelect.init(stopbits);
+  mcss.FormSelect.init(stopbits);
   let flowcontrol = document.getElementById("flowcontrol-select");
   flowcontrol.selectedIndex = config.general.flowcontrolIndex;
-  M.FormSelect.init(flowcontrol);
+  mcss.FormSelect.init(flowcontrol);
 
   document.getElementById("editor-font-family").value =
     config.general.fontFamily;
@@ -371,7 +371,7 @@ document.body.onclick = (e) => {
 };
 
 document.getElementById("menu-tabs").onclick = () => {
-  let tabs = M.Tabs.getInstance(document.getElementById("menu-tabs"));
+  let tabs = mcss.Tabs.getInstance(document.getElementById("menu-tabs"));
 
   configUpdate("menu.tab", tabs.$content[0].id);
 };
@@ -404,7 +404,7 @@ document.getElementById("customized").onblur = (e) => {
   let baudSelect = document.getElementById("baud-select");
 
   baudSelect.options[0].text = customized;
-  M.FormSelect.init(baudSelect);
+  mcss.FormSelect.init(baudSelect);
 };
 
 document.getElementById("databits-select").onchange = (e) => {
@@ -463,8 +463,8 @@ document.getElementById("trans-send-btn").onclick = () => {
   if (serialWrite(data) === false) return;
 
   p.value += "\n" + document.getElementById("trans-data").value;
-  M.updateTextFields(p);
-  M.textareaAutoResize(p);
+  mcss.updateTextFields(p);
+  mcss.textareaAutoResize(p);
   p.scrollTop = p.scrollHeight;
 
   if (document.getElementById("trans-repeat-switch").checked === true) {
@@ -491,8 +491,8 @@ document.getElementById("trans-log-btn").onclick = () => {
   let p = document.getElementById("trans-log-area");
 
   p.value = "";
-  M.updateTextFields(p);
-  M.textareaAutoResize(p);
+  mcss.updateTextFields(p);
+  mcss.textareaAutoResize(p);
 };
 
 document.getElementById("bar-color-head").oninput = (e) => {
diff --git a/src/editor.js b/src/editor.js
index 3249418..27add74 100644
--- a/src/editor.js
+++ b/src/editor.js
@@ -40,8 +40,8 @@ function decoGet() {
   return decoTable[decoIndex++ % decoMod];
 }
 
-function decoApply(m, text) {
-  let matches = m.findMatches(
+function decoApply(model, text) {
+  let matches = model.findMatches(
     text,
     false,
     false,
@@ -56,7 +56,7 @@ function decoApply(m, text) {
   for (let i of matches) {
     let range = i.range;
 
-    m.deltaDecorations(
+    model.deltaDecorations(
       [],
       [
         {
@@ -74,8 +74,8 @@ function decoApply(m, text) {
   }
 }
 
-function decoRemove(m, text) {
-  let matches = m.findMatches(
+function decoRemove(model, text) {
+  let matches = model.findMatches(
     text,
     false,
     false,
@@ -85,11 +85,11 @@ function decoRemove(m, text) {
   );
 
   for (let match of matches) {
-    let decos = m.getDecorationsInRange(match.range);
+    let decos = model.getDecorationsInRange(match.range);
 
     // super word remove decoration will cause sub word decoration to 1
     for (let deco of decos) {
-      m.deltaDecorations([deco.id], []);
+      model.deltaDecorations([deco.id], []);
     }
   }
 }
@@ -97,11 +97,11 @@ function decoRemove(m, text) {
 function highlightToggle() {
   console.log("highligh toggle");
   let decoExpectedLength = 1;
-  let m = editor.getModel();
+  let model = editor.getModel();
   let range = editor.getSelection();
-  let text = m.getValueInRange(range);
+  let text = model.getValueInRange(range);
   if (text === "") {
-    let word = m.getWordAtPosition(editor.getPosition());
+    let word = model.getWordAtPosition(editor.getPosition());
     text = word.word;
     range.startColumn = word.startColumn;
     range.endColumn = word.endColumn;
@@ -110,11 +110,11 @@ function highlightToggle() {
 
   if (text === "") return;
 
-  let decos = m.getDecorationsInRange(range);
+  let decos = model.getDecorationsInRange(range);
   if (decos.length === decoExpectedLength) {
-    decoApply(m, text);
+    decoApply(model, text);
   } else {
-    decoRemove(m, text);
+    decoRemove(model, text);
   }
 
   return null;
diff --git a/src/preload.js b/src/preload.js
index 2d924b6..a2c64fa 100755
--- a/src/preload.js
+++ b/src/preload.js
@@ -1,5 +1,6 @@
 // All of the Node.js APIs are available in the preload process.
 // It has the same sandbox as a Chrome extension.
+
 let pjson = require("../package.json");
 if ("dev" == pjson.mode) {
   console.log("dev mode");
@@ -7,8 +8,10 @@ if ("dev" == pjson.mode) {
   const fs = require("fs");
   let terser = require("terser");
   let options = {
-    toplevel: true,
-    sourceMap: true,
+    sourceMap: {
+      filename: "index.js",
+      url: "index.js.map",
+    },
   };
   let result = terser.minify(
     {
diff --git a/src/serialport.js b/src/serialport.js
index 0d382a3..d82c58a 100644
--- a/src/serialport.js
+++ b/src/serialport.js
@@ -23,7 +23,7 @@ function portUpdate() {
         pSelect.options.add(new Option(item.path, index));
         if (index === config.pathIndex) pSelect.selectedIndex = index;
       });
-      M.FormSelect.init(pSelect);
+      mcss.FormSelect.init(pSelect);
     })
     .catch((e) => {
       console.error(e);
@@ -127,7 +127,7 @@ function serialGetOptions() {
 }
 
 function toast(text) {
-  M.toast({ html: text, displayLength: 1000 });
+  mcss.toast({ html: text, displayLength: 1000 });
   // alert(text)
 }
 
@@ -159,7 +159,7 @@ document.getElementById("port-switch").onclick = (e) => {
       if (config.general.modemSignal === true) {
         modemSignalTimer = setInterval(modemSignalTimerHandle, 100);
       }
-      port.set({rts: true, dtr: true}, (e) => {
+      port.set({ rts: true, dtr: true }, (e) => {
         if (e !== null) console.error(e);
       });
     });