diff --git a/frontend/src/ts/test/test-stats.ts b/frontend/src/ts/test/test-stats.ts
index 588264e59..43fb90085 100644
--- a/frontend/src/ts/test/test-stats.ts
+++ b/frontend/src/ts/test/test-stats.ts
@@ -188,7 +188,7 @@ export function setInvalid(): void {
 export function calculateTestSeconds(now?: number): number {
   if (now === undefined) {
     const endAfkSeconds = (end - TestInput.lastKeypress) / 1000;
-    if ((Config.mode == "zen" || TestInput.bailout) && endAfkSeconds < 7) {
+    if ((Config.mode === "zen" || TestInput.bailout) && endAfkSeconds < 7) {
       return (TestInput.lastKeypress - start) / 1000;
     } else {
       return (end - start) / 1000;
@@ -213,11 +213,11 @@ export function calculateWpmAndRaw(): MonkeyTypes.WordsPerMinuteAndRaw {
   for (let i = 0; i < TestInput.input.history.length; i++) {
     const word: string = !containsKorean
       ? //english
-        Config.mode == "zen"
+        Config.mode === "zen"
         ? (TestInput.input.getHistory(i) as string)
         : TestWords.words.get(i)
       : //korean
-      Config.mode == "zen"
+      Config.mode === "zen"
       ? Hangul.disassemble(TestInput.input.getHistory(i) as string).join("")
       : Hangul.disassemble(TestWords.words.get(i)).join("");
 
@@ -242,7 +242,7 @@ export function calculateWpmAndRaw(): MonkeyTypes.WordsPerMinuteAndRaw {
   }
   if (currTestInput !== "") {
     const word =
-      Config.mode == "zen"
+      Config.mode === "zen"
         ? currTestInput
         : !containsKorean
         ? TestWords.words.getCurrent()
@@ -269,7 +269,7 @@ export function calculateWpmAndRaw(): MonkeyTypes.WordsPerMinuteAndRaw {
     chars += toAdd.correct;
     chars += toAdd.incorrect;
     chars += toAdd.missed;
-    if (toAdd.incorrect == 0) {
+    if (toAdd.incorrect === 0) {
       //word is correct so far, add chars
       correctWordChars += toAdd.correct;
     }
@@ -334,13 +334,13 @@ export function calculateBurst(): number {
   wordLength = !containsKorean
     ? TestInput.input.current.length
     : Hangul.disassemble(TestInput.input.current).length;
-  if (wordLength == 0) {
+  if (wordLength === 0) {
     wordLength = !containsKorean
       ? TestInput.input.getHistoryLast()?.length ?? 0
       : Hangul.disassemble(TestInput.input.getHistoryLast() as string)
           ?.length ?? 0;
   }
-  if (wordLength == 0) return 0;
+  if (wordLength === 0) return 0;
   const speed = Misc.roundTo2((wordLength * (60 / timeToWrite)) / 5);
   return Math.round(speed);
 }
@@ -373,11 +373,11 @@ function countChars(): CharCount {
     const containsKorean = TestInput.input.getKoreanStatus();
     const word: string = !containsKorean
       ? //english
-        Config.mode == "zen"
+        Config.mode === "zen"
         ? (TestInput.input.getHistory(i) as string)
         : TestWords.words.get(i)
       : //korean
-      Config.mode == "zen"
+      Config.mode === "zen"
       ? Hangul.disassemble(TestInput.input.getHistory(i) as string).join("")
       : Hangul.disassemble(TestWords.words.get(i)).join("");
 
@@ -389,7 +389,7 @@ function countChars(): CharCount {
       ? (TestInput.input.getHistory(i) as string)
       : Hangul.disassemble(TestInput.input.getHistory(i) as string).join("");
 
-    if (historyWord == word) {
+    if (historyWord === word) {
       //the word is correct
       correctWordChars += word.length;
       correctChars += word.length;
@@ -404,7 +404,7 @@ function countChars(): CharCount {
       for (let c = 0; c < historyWord.length; c++) {
         if (c < word.length) {
           //on char that still has a word list pair
-          if (historyWord[c] == word[c]) {
+          if (historyWord[c] === word[c]) {
             correctChars++;
           } else {
             incorrectChars++;
@@ -424,7 +424,7 @@ function countChars(): CharCount {
       for (let c = 0; c < word.length; c++) {
         if (c < historyWord.length) {
           //on char that still has a word list pair
-          if (historyWord[c] == word[c]) {
+          if (historyWord[c] === word[c]) {
             toAdd.correct++;
           } else {
             toAdd.incorrect++;
@@ -436,7 +436,7 @@ function countChars(): CharCount {
       }
       correctChars += toAdd.correct;
       incorrectChars += toAdd.incorrect;
-      if (i === TestInput.input.history.length - 1 && Config.mode == "time") {
+      if (i === TestInput.input.history.length - 1 && Config.mode === "time") {
         //last word - check if it was all correct - add to correct word chars
         if (toAdd.incorrect === 0) correctWordChars += toAdd.correct;
       } else {
@@ -458,7 +458,7 @@ function countChars(): CharCount {
     correctWordChars: correctWordChars,
     allCorrectChars: correctChars,
     incorrectChars:
-      Config.mode == "zen" ? TestInput.accuracy.incorrect : incorrectChars,
+      Config.mode === "zen" ? TestInput.accuracy.incorrect : incorrectChars,
     extraChars: extraChars,
     missedChars: missedChars,
     correctSpaces: correctspaces,
@@ -471,7 +471,7 @@ export function calculateStats(): Stats {
     console.log("date based time", (end2 - start2) / 1000);
     console.log("performance.now based time", testSeconds);
   }
-  if (Config.mode != "custom") {
+  if (Config.mode !== "custom") {
     testSeconds = Misc.roundTo2(testSeconds);
     if (wpmCalcDebug) {
       console.log("mode is not custom - wounding");
diff --git a/frontend/src/ts/test/test-timer.ts b/frontend/src/ts/test/test-timer.ts
index 6e441b016..151753766 100644
--- a/frontend/src/ts/test/test-timer.ts
+++ b/frontend/src/ts/test/test-timer.ts
@@ -147,7 +147,7 @@ function checkIfFailed(
 function checkIfTimeIsUp(): void {
   if (timerDebug) console.time("times up check");
   if (
-    Config.mode == "time" ||
+    Config.mode === "time" ||
     (Config.mode === "custom" && CustomText.isTimeRandom)
   ) {
     if (
diff --git a/frontend/src/ts/test/test-ui.ts b/frontend/src/ts/test/test-ui.ts
index eeee40847..0c39649b1 100644
--- a/frontend/src/ts/test/test-ui.ts
+++ b/frontend/src/ts/test/test-ui.ts
@@ -108,10 +108,10 @@ export function focusWords(): void {
 
 export function updateActiveElement(backspace?: boolean): void {
   const active = document.querySelector("#words .active");
-  if (Config.mode == "zen" && backspace) {
+  if (Config.mode === "zen" && backspace) {
     active?.remove();
   } else if (active !== null) {
-    if (Config.highlightMode == "word") {
+    if (Config.highlightMode === "word") {
       active.querySelectorAll("letter").forEach((e) => {
         e.classList.remove("correct");
       });
@@ -125,7 +125,7 @@ export function updateActiveElement(backspace?: boolean): void {
     activeWord.classList.remove("error");
     activeWordTop = (<HTMLElement>document.querySelector("#words .active"))
       .offsetTop;
-    if (Config.highlightMode == "word") {
+    if (Config.highlightMode === "word") {
       activeWord.querySelectorAll("letter").forEach((e) => {
         e.classList.add("correct");
       });
@@ -200,8 +200,8 @@ export function updateWordsHeight(): void {
   );
   if (
     Config.showAllLines &&
-    Config.mode != "time" &&
-    !(CustomText.isWordRandom && CustomText.word == 0) &&
+    Config.mode !== "time" &&
+    !(CustomText.isWordRandom && CustomText.word === 0) &&
     !CustomText.isTimeRandom
   ) {
     $("#words")
@@ -457,10 +457,10 @@ export function updateWordElement(showError = !Config.blindMode): void {
       (f) => f.functions?.getWordHtml
     );
     for (let i = 0; i < input.length; i++) {
-      const charCorrect = currentWord[i] == input[i];
+      const charCorrect = currentWord[i] === input[i];
 
       let correctClass = "correct";
-      if (Config.highlightMode == "off") {
+      if (Config.highlightMode === "off") {
         correctClass = "";
       }
 
@@ -469,7 +469,7 @@ export function updateWordElement(showError = !Config.blindMode): void {
       let nlChar = "";
       if (funbox?.functions?.getWordHtml) {
         const cl = funbox.functions.getWordHtml(currentLetter);
-        if (cl != "") {
+        if (cl !== "") {
           currentLetter = cl;
         }
       } else if (currentLetter === "\t") {
@@ -482,7 +482,7 @@ export function updateWordElement(showError = !Config.blindMode): void {
 
       if (charCorrect) {
         ret += `<letter class="${
-          Config.highlightMode == "word"
+          Config.highlightMode === "word"
             ? wordHighlightClassString
             : correctClass
         } ${tabChar}${nlChar}">${currentLetter}</letter>`;
@@ -493,12 +493,12 @@ export function updateWordElement(showError = !Config.blindMode): void {
         !(containsKorean && !correctSoFar)
       ) {
         ret += `<letter class="${
-          Config.highlightMode == "word" ? wordHighlightClassString : ""
+          Config.highlightMode === "word" ? wordHighlightClassString : ""
         } dead">${currentLetter}</letter>`;
       } else if (!showError) {
         if (currentLetter !== undefined) {
           ret += `<letter class="${
-            Config.highlightMode == "word"
+            Config.highlightMode === "word"
               ? wordHighlightClassString
               : correctClass
           } ${tabChar}${nlChar}">${currentLetter}</letter>`;
@@ -506,11 +506,11 @@ export function updateWordElement(showError = !Config.blindMode): void {
       } else if (currentLetter === undefined) {
         if (!Config.hideExtraLetters) {
           let letter = input[i];
-          if (letter == " " || letter == "\t" || letter == "\n") {
+          if (/\s/.test(letter)) {
             letter = "_";
           }
           ret += `<letter class="${
-            Config.highlightMode == "word"
+            Config.highlightMode === "word"
               ? wordHighlightClassString
               : "incorrect"
           } extra ${tabChar}${nlChar}">${letter}</letter>`;
@@ -518,12 +518,12 @@ export function updateWordElement(showError = !Config.blindMode): void {
       } else {
         ret +=
           `<letter class="${
-            Config.highlightMode == "word"
+            Config.highlightMode === "word"
               ? wordHighlightClassString
               : "incorrect"
           } ${tabChar}${nlChar}">` +
           (Config.indicateTypos === "replace"
-            ? input[i] == " "
+            ? input[i] === " "
               ? "_"
               : input[i]
             : currentLetter) +
@@ -542,7 +542,7 @@ export function updateWordElement(showError = !Config.blindMode): void {
       } else {
         ret +=
           `<letter class="${
-            Config.highlightMode == "word" ? wordHighlightClassString : ""
+            Config.highlightMode === "word" ? wordHighlightClassString : ""
           }">` +
           currentWord[i] +
           "</letter>";
@@ -552,7 +552,7 @@ export function updateWordElement(showError = !Config.blindMode): void {
     if (Config.highlightMode === "letter" && Config.hideExtraLetters) {
       if (input.length > currentWord.length && !Config.blindMode) {
         wordAtIndex.classList.add("error");
-      } else if (input.length == currentWord.length) {
+      } else if (input.length === currentWord.length) {
         wordAtIndex.classList.remove("error");
       }
     }
@@ -765,11 +765,11 @@ async function loadWordsHistory(): Promise<boolean> {
           incorrect: 0,
           missed: 0,
         };
-        const length = Config.mode == "zen" ? input.length : word.length;
+        const length = Config.mode === "zen" ? input.length : word.length;
         for (let c = 0; c < length; c++) {
           if (c < input.length) {
             //on char that still has a word list pair
-            if (Config.mode == "zen" || input[c] == word[c]) {
+            if (Config.mode === "zen" || input[c] === word[c]) {
               wordstats.correct++;
             } else {
               wordstats.incorrect++;
@@ -780,14 +780,14 @@ async function loadWordsHistory(): Promise<boolean> {
           }
         }
         if (wordstats.incorrect !== 0 || Config.mode !== "time") {
-          if (Config.mode != "zen" && input !== word) {
+          if (Config.mode !== "zen" && input !== word) {
             wordEl = `<div class='word error' burst="${
               TestInput.burstHistory[i]
             }" input="${input.replace(/"/g, "&quot;").replace(/ /g, "_")}">`;
           }
         }
       } else {
-        if (Config.mode != "zen" && input !== word) {
+        if (Config.mode !== "zen" && input !== word) {
           wordEl = `<div class='word error' burst="${
             TestInput.burstHistory[i]
           }" input="${input.replace(/"/g, "&quot;").replace(/ /g, "_")}">`;
@@ -795,7 +795,7 @@ async function loadWordsHistory(): Promise<boolean> {
       }
 
       let loop;
-      if (Config.mode == "zen" || input.length > word.length) {
+      if (Config.mode === "zen" || input.length > word.length) {
         //input is longer - extra characters possible (loop over input)
         loop = input.length;
       } else {
@@ -822,8 +822,8 @@ async function loadWordsHistory(): Promise<boolean> {
         ) {
           extraCorrected = "extraCorrected";
         }
-        if (Config.mode == "zen" || word[c] !== undefined) {
-          if (Config.mode == "zen" || input[c] === word[c]) {
+        if (Config.mode === "zen" || word[c] !== undefined) {
+          if (Config.mode === "zen" || input[c] === word[c]) {
             if (correctedChar === input[c] || correctedChar === undefined) {
               wordEl += `<letter class="correct ${extraCorrected}">${input[c]}</letter>`;
             } else {
@@ -1013,7 +1013,7 @@ $("#saveScreenshotButton").on("keypress", (e) => {
 $(".pageTest #copyWordsListButton").on("click", async () => {
   try {
     let words;
-    if (Config.mode == "zen") {
+    if (Config.mode === "zen") {
       words = TestInput.input.history.join(" ");
     } else {
       words = (<string[]>TestWords.words.get())
@@ -1043,7 +1043,7 @@ $(".pageTest #resultWordsHistory").on("mouseenter", ".words .word", (e) => {
   if (resultVisible) {
     const input = $(e.currentTarget).attr("input");
     const burst = parseInt(<string>$(e.currentTarget).attr("burst"));
-    if (input != undefined) {
+    if (input !== undefined) {
       $(e.currentTarget).append(
         `<div class="wordInputAfter">
           <div class="text">
diff --git a/frontend/src/ts/test/timer-progress.ts b/frontend/src/ts/test/timer-progress.ts
index c04353d3d..1a9d0f5e8 100644
--- a/frontend/src/ts/test/timer-progress.ts
+++ b/frontend/src/ts/test/timer-progress.ts
@@ -9,8 +9,8 @@ import * as TestState from "./test-state";
 import * as ConfigEvent from "../observables/config-event";
 
 export function show(): void {
-  const op = Config.showTimerProgress ? Config.timerOpacity : 0;
-  if (Config.mode != "zen" && Config.timerStyle === "bar") {
+  const op = Config.showTimerProgress ? parseInt(Config.timerOpacity) : 0;
+  if (Config.mode !== "zen" && Config.timerStyle === "bar") {
     $("#timerWrapper").stop(true, true).removeClass("hidden").animate(
       {
         opacity: op,
@@ -28,7 +28,7 @@ export function show(): void {
         },
         125
       );
-  } else if (Config.mode == "zen" || Config.timerStyle === "mini") {
+  } else if (Config.mode === "zen" || Config.timerStyle === "mini") {
     if (op > 0) {
       $("#miniTimerAndLiveWpm .time")
         .stop(true, true)
@@ -186,7 +186,7 @@ export function update(): void {
         }
       }
     }
-  } else if (Config.mode == "zen") {
+  } else if (Config.mode === "zen") {
     if (Config.timerStyle === "text") {
       if (timerNumberElement !== null) {
         timerNumberElement.innerHTML =
diff --git a/frontend/src/ts/test/weak-spot.ts b/frontend/src/ts/test/weak-spot.ts
index bb4ee1ed7..3d8a9c30d 100644
--- a/frontend/src/ts/test/weak-spot.ts
+++ b/frontend/src/ts/test/weak-spot.ts
@@ -56,7 +56,7 @@ function score(word: string): number {
       numChars++;
     }
   }
-  return numChars == 0 ? 0.0 : total / numChars;
+  return numChars === 0 ? 0.0 : total / numChars;
 }
 
 export function getWord(wordset: Wordset): string {
@@ -65,7 +65,7 @@ export function getWord(wordset: Wordset): string {
   for (let i = 0; i < wordSamples; i++) {
     const newWord = wordset.randomWord("normal");
     const newScore = score(newWord);
-    if (i == 0 || highScore === undefined || newScore > highScore) {
+    if (i === 0 || highScore === undefined || newScore > highScore) {
       randomWord = newWord;
       highScore = newScore;
     }