feat: enable stricter type checking options

feat: make the app more fault tolerant

package.json

@@ -22,8 +22,7 @@
     "tauri": "tauri",
     "test": "vitest run --coverage",
     "preview": "vite preview",
-    "check": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json",
+    "check": "svelte-kit sync && svelte-check --tsconfig ./tsconfig.json",
-    "check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch",
     "minify-icons": "node src/tools/minify-icon-font.js",
     "version": "node src/tools/version.js && git add src-tauri/Cargo.toml && git add src-tauri/tauri.conf.json",
     "lint": "prettier --check .",

src/env.d.ts

@@ -11,7 +11,7 @@ interface ImportMetaEnv {
   readonly VITE_HOMEPAGE_URL: string;
   readonly VITE_BUGS_URL: string;
   readonly VITE_DOCS_URL: string;
-  readonly VIET_LEARN_URL: string;
+  readonly VITE_LEARN_URL: string;
   readonly VITE_LATEST_FIRMWARE: string;
 }
 

src/i18n/formatters.ts

@@ -2,7 +2,7 @@ import type { FormattersInitializer } from "typesafe-i18n";
 import type { Locales, Formatters } from "./i18n-types";
 
 export const initFormatters: FormattersInitializer<Locales, Formatters> = (
-  locale: Locales,
+  _locale: Locales,
 ) => {
   const formatters: Formatters = {
     // add your formatter functions here

src/lib/backup/backup.ts

@@ -95,6 +95,7 @@ export function restoreFromFile(
   switch (file.type) {
     case "backup": {
       const recent = file.history[0];
+      if (!recent) return;
       if (recent[1].device !== get(serialPort)?.device) {
         alert("Backup is incompatible with this device");
         throw new Error("Backup is incompatible with this device");
@@ -177,7 +178,7 @@ export function getChangesFromLayoutFile(file: CharaLayoutFile) {
   const changes: Change[] = [];
   for (const [layer, keys] of file.layout.entries()) {
     for (const [id, action] of keys.entries()) {
-      if (get(layout)[layer][id].action !== action) {
+      if (get(layout)[layer]?.[id]?.action !== action) {
         changes.push({
           type: ChangeType.Layout,
           layer,

src/lib/backup/compat/legacy-chords.ts

@@ -13,11 +13,11 @@ export function csvChordsToJson(csv: string): CharaChordFile {
       .map((line) => {
         const [input, output] = line.split(/,(?=[^,]*$)/, 2);
         return [
-          input
+          input!
             .split("+")
             .map((it) => KEYMAP_IDS.get(it.trim())?.code ?? 0)
             .sort((a, b) => a - b),
-          output
+          output!
             .trim()
             .split("")
             .map((it) => KEYMAP_IDS.get(SPECIAL_KEYS.get(it) ?? it)?.code ?? 0),

src/lib/backup/compat/legacy-layout.ts

@@ -17,7 +17,7 @@ export function csvLayoutToJson(
   for (const layer of csv.trim().split("\n")) {
     const [layerId, key, action] = layer.substring(1).split(",").map(Number);
 
-    layout.layout[Number(layerId) - 1][Number(key)] = Number(action);
+    layout.layout[Number(layerId) - 1]![Number(key)] = Number(action);
   }
 
   return layout;

src/lib/components/Action.svelte

@@ -10,7 +10,7 @@
 
   $: info =
     typeof action === "number"
-      ? KEYMAP_CODES[action] ?? { code: action }
+      ? KEYMAP_CODES.get(action) ?? { code: action }
       : action;
   $: dynamicMapping = info.keyCode && $osLayout.get(info.keyCode);
 

src/lib/components/ActionListItem.svelte

@@ -6,7 +6,7 @@
 
   export let id: number | KeyInfo;
 
-  $: key = (typeof id === "number" ? KEYMAP_CODES[id] ?? id : id) as
+  $: key = (typeof id === "number" ? KEYMAP_CODES.get(id) ?? id : id) as
     | number
     | KeyInfo;
 </script>
@@ -25,10 +25,10 @@
       {#if key.description}
         <i>{key.description}</i>
       {/if}
-      {#if key.category.name === "ASCII Macros"}
+      {#if key.category?.name === "ASCII Macros"}
         <span class="warning">{@html $LL.actionSearch.SHIFT_WARNING()}</span>
       {/if}
-      {#if key.category.name === "CP-1252"}
+      {#if key.category?.name === "CP-1252"}
         <span class="warning">{@html $LL.actionSearch.ALT_CODE_WARNING()}</span>
       {/if}
     </div>

src/lib/components/PwaStatus.svelte

@@ -1,4 +1,5 @@
 <script>
+  // @ts-expect-error no types here
   import { useRegisterSW } from "virtual:pwa-register/svelte";
 
   const { needRefresh, updateServiceWorker, offlineReady } = useRegisterSW();

src/lib/components/Terminal.svelte

@@ -4,7 +4,7 @@
 
   function submit(event: Event) {
     event.preventDefault();
-    $serialPort.send(value.trim());
+    $serialPort?.send(0, value.trim());
     value = "";
     io.scrollTo({ top: io.scrollHeight });
   }

src/lib/components/layout/ActionSelector.svelte

@@ -26,7 +26,7 @@
   );
 
   function search() {
-    results = index!.search(searchBox.value);
+    results = index!.search(searchBox.value) as number[];
     exact = exactIndex[searchBox.value]?.code;
     code = Number(searchBox.value);
   }

src/lib/components/layout/GenericLayout.svelte

@@ -121,9 +121,11 @@
 
   function edit(index: number) {
     const keyInfo = layoutInfo.keys[index];
+    if (!keyInfo) return;
     const clickedGroup = groupParent.children.item(index) as SVGGElement;
-    const nextAction = get(layout)[get(activeLayer)][keyInfo.id];
+    const nextAction = get(layout)[get(activeLayer)]?.[keyInfo.id];
-    const currentAction = get(deviceLayout)[get(activeLayer)][keyInfo.id];
+    const currentAction = get(deviceLayout)[get(activeLayer)]?.[keyInfo.id];
+    if (!nextAction || !currentAction) return;
     const component = new ActionSelector({
       target: document.body,
       props: {

src/lib/components/layout/KeyText.svelte

@@ -23,13 +23,12 @@
 </script>
 
 {#each positions as position, layer}
-  {@const { action: actionId, isApplied } = $layout[layer][key.id] ?? {
+  {@const { action: actionId, isApplied } = $layout[layer]?.[key.id] ?? {
     action: 0,
     isApplied: true,
   }}
-  {@const { code, icon, id, display, title, keyCode, variant } = KEYMAP_CODES[
+  {@const { code, icon, id, display, title, keyCode, variant } =
-    actionId
+    KEYMAP_CODES.get(actionId) ?? { code: actionId }}
-  ] ?? { code: actionId }}
   {@const dynamicMapping = keyCode && $osLayout.get(keyCode)}
   {@const tooltip =
     (title ?? id ?? `0x${code.toString(16)}`) +
@@ -53,7 +52,7 @@
     style:scale={isActive ? 1 : `var(--inactive-scale, ${inactiveScale})`}
     style:translate={isActive
       ? "0 0 0"
-      : `${direction[0].toPrecision(2)}px ${direction[1].toPrecision(2)}px 0`}
+      : `${direction[0]?.toPrecision(2)}px ${direction[1]?.toPrecision(2)}px 0`}
     style:rotate="{rotate}deg"
     use:action={{ title: tooltip }}
   >

src/lib/dialogs/PickChangesDialog.svelte

@@ -119,17 +119,21 @@
           </label>
         </h3>
         <ul>
-          {#each layoutChanges
+          {#each layoutChanges as changes, i}
-            .map((it, i) => /** @type {const} */ ([it, i + 1]))
+            {@const layer = i + 1}
-            .filter(([it]) => it.length > 0) as [changes, layer]}
+            {#if changes.length > 0}
               <li>
                 <h4>
                   <label>
                     <input type="checkbox" class="checkbox" />
-                  {$LL.changes.layout.LAYER({ changes: changes.length, layer })}
+                    {$LL.changes.layout.LAYER({
+                      changes: changes.length,
+                      layer,
+                    })}
                   </label>
                 </h4>
               </li>
+            {/if}
           {/each}
         </ul>
       </li>

src/lib/serial/TauriSerialDialog.svelte

@@ -3,7 +3,7 @@
 
   export let ports: SerialPort[];
   const dispatch = createEventDispatcher<{ confirm: SerialPort | undefined }>();
-  let selected = ports[0].getInfo().name;
+  let selected = ports[0]?.getInfo().name;
 </script>
 
 <dialog>

src/lib/serial/chord.ts

@@ -37,7 +37,7 @@ export function serializeActions(actions: number[]): bigint {
   let native = 0n;
   for (let i = 1; i <= actions.length; i++) {
     native |=
-      BigInt(actions[actions.length - i] & 0x3ff) << BigInt((12 - i) * 10);
+      BigInt(actions[actions.length - i]! & 0x3ff) << BigInt((12 - i) * 10);
   }
   return native;
 }

src/lib/serial/connection.ts

@@ -67,7 +67,9 @@ export async function sync() {
   syncStatus.set("downloading");
 
   const max =
-    Object.keys(settingInfo.settings).length + device.keyCount * 3 + chordCount;
+    Object.keys(settingInfo["settings"]).length +
+    device.keyCount * 3 +
+    chordCount;
   let current = 0;
   syncProgress.set({ max, current });
   function progressTick() {
@@ -76,7 +78,7 @@ export async function sync() {
   }
 
   const parsedSettings: number[] = [];
-  for (const key in settingInfo.settings) {
+  for (const key in settingInfo["settings"]) {
     try {
       parsedSettings[Number.parseInt(key)] = await device.getSetting(
         Number.parseInt(key),
@@ -89,7 +91,7 @@ export async function sync() {
   const parsedLayout: CharaLayout = [[], [], []];
   for (let layer = 1; layer <= 3; layer++) {
     for (let i = 0; i < device.keyCount; i++) {
-      parsedLayout[layer - 1][i] = await device.getLayoutKey(layer, i);
+      parsedLayout[layer - 1]![i] = await device.getLayoutKey(layer, i);
       progressTick();
     }
   }

src/lib/serial/device.ts

@@ -48,11 +48,17 @@ export async function getViablePorts(): Promise<SerialPort[]> {
   );
 }
 
+type LengthArray<T, N extends number, R extends T[] = []> = number extends N
+  ? T[]
+  : R["length"] extends N
+    ? R
+    : LengthArray<T, N, [T, ...R]>;
+
 export async function canAutoConnect() {
   return getViablePorts().then((it) => it.length === 1);
 }
 
-function timeout<T>(promise: Promise<T>, ms: number): Promise<T> {
+async function timeout<T>(promise: Promise<T>, ms: number): Promise<T> {
   let timer: number;
   return Promise.race([
     promise,
@@ -96,7 +102,7 @@ export class CharaDevice {
       const ports = await getViablePorts();
       this.port =
         !manual && ports.length === 1
-          ? ports[0]
+          ? ports[0]!
           : await navigator.serial.requestPort({
               filters: [...PORT_FILTERS.values()],
             });
@@ -115,9 +121,9 @@ export class CharaDevice {
       await this.port.close();
 
       this.version = new SemVer(
-        await this.send("VERSION").then(([version]) => version),
+        await this.send(1, "VERSION").then(([version]) => version),
       );
-      const [company, device, chipset] = await this.send("ID");
+      const [company, device, chipset] = await this.send(3, "ID");
       this.company = company as "CHARACHORDER";
       this.device = device as "ONE" | "LITE" | "X";
       this.chipset = chipset as "M0" | "S2";
@@ -186,6 +192,7 @@ export class CharaDevice {
         return it;
       });
     }
+    return undefined;
   }
 
   /**
@@ -256,20 +263,38 @@ export class CharaDevice {
   /**
    * Send to serial port
    */
-  async send(...command: string[]) {
+  async send<T extends number>(
+    expectedLength: T,
+    ...command: string[]
+  ): Promise<LengthArray<string, T>> {
     return this.runWith(async (send, read) => {
       await send(...command);
       const commandString = command
         .join(" ")
         .replace(/[-[\]{}()*+?.,\\^$|#\s]/g, "\\$&");
-      return read().then((it) =>
+      const readResult = await read();
-        it.replace(new RegExp(`^${commandString} `), "").split(" "),
+      if (readResult === undefined) {
-      );
+        console.error("No response");
+        return Array(expectedLength).fill("NO_RESPONSE") as LengthArray<
+          string,
+          T
+        >;
+      }
+      const array = readResult
+        .replace(new RegExp(`^${commandString} `), "")
+        .split(" ");
+      if (array.length < expectedLength) {
+        console.error("Response too short");
+        return array.concat(
+          Array(expectedLength - array.length).fill("TOO_SHORT"),
+        ) as LengthArray<string, T>;
+      }
+      return array as LengthArray<string, T>;
     });
   }
 
   async getChordCount(): Promise<number> {
-    const [count] = await this.send("CML C0");
+    const [count] = await this.send(1, "CML C0");
     return Number.parseInt(count);
   }
 
@@ -277,7 +302,7 @@ export class CharaDevice {
    * Retrieves a chord by index
    */
   async getChord(index: number | number[]): Promise<Chord> {
-    const [actions, phrase] = await this.send(`CML C1 ${index}`);
+    const [actions, phrase] = await this.send(2, `CML C1 ${index}`);
     return {
       actions: parseChordActions(actions),
       phrase: parsePhrase(phrase),
@@ -289,6 +314,7 @@ export class CharaDevice {
    */
   async getChordPhrase(actions: number[]): Promise<number[] | undefined> {
     const [phrase] = await this.send(
+      1,
       `CML C2 ${stringifyChordActions(actions)}`,
     );
     return phrase === "2" ? undefined : parsePhrase(phrase);
@@ -296,6 +322,7 @@ export class CharaDevice {
 
   async setChord(chord: Chord) {
     const [status] = await this.send(
+      1,
       "CML",
       "C3",
       stringifyChordActions(chord.actions),
@@ -306,10 +333,10 @@ export class CharaDevice {
 
   async deleteChord(chord: Pick<Chord, "actions">) {
     const status = await this.send(
+      1,
       `CML C4 ${stringifyChordActions(chord.actions)}`,
     );
-    console.log(status);
+    if (status?.at(-1) !== "2" && status?.at(-1) !== "0")
-    if (status.at(-1) !== "2" && status.at(-1) !== "0")
       throw new Error(`Failed with status ${status}`);
   }
 
@@ -320,8 +347,7 @@ export class CharaDevice {
    * @param action the assigned action id
    */
   async setLayoutKey(layer: number, id: number, action: number) {
-    const [status] = await this.send(`VAR B4 A${layer} ${id} ${action}`);
+    const [status] = await this.send(1, `VAR B4 A${layer} ${id} ${action}`);
-    console.log(status);
     if (status !== "0") throw new Error(`Failed with status ${status}`);
   }
 
@@ -332,7 +358,7 @@ export class CharaDevice {
    * @returns the assigned action id
    */
   async getLayoutKey(layer: number, id: number) {
-    const [position, status] = await this.send(`VAR B3 A${layer} ${id}`);
+    const [position, status] = await this.send(2, `VAR B3 A${layer} ${id}`);
     if (status !== "0") throw new Error(`Failed with status ${status}`);
     return Number(position);
   }
@@ -345,7 +371,7 @@ export class CharaDevice {
    * **This does not need to be called for chords**
    */
   async commit() {
-    const [status] = await this.send("VAR B0");
+    const [status] = await this.send(1, "VAR B0");
     if (status !== "0") throw new Error(`Failed with status ${status}`);
   }
 
@@ -357,6 +383,7 @@ export class CharaDevice {
    */
   async setSetting(id: number, value: number) {
     const [status] = await this.send(
+      1,
       `VAR B2 ${id.toString(16).toUpperCase()} ${value}`,
     );
     if (status !== "0") throw new Error(`Failed with status ${status}`);
@@ -367,6 +394,7 @@ export class CharaDevice {
    */
   async getSetting(id: number): Promise<number> {
     const [value, status] = await this.send(
+      2,
       `VAR B1 ${id.toString(16).toUpperCase()}`,
     );
     if (status !== "0")
@@ -380,14 +408,14 @@ export class CharaDevice {
    * Reboots the device
    */
   async reboot() {
-    await this.send("RST");
+    await this.send(0, "RST");
   }
 
   /**
    * Reboots the device to the bootloader
    */
   async bootloader() {
-    await this.send("RST BOOTLOADER");
+    await this.send(0, "RST BOOTLOADER");
   }
 
   /**
@@ -396,7 +424,7 @@ export class CharaDevice {
   async reset(
     type: "FACTORY" | "PARAMS" | "KEYMAPS" | "STARTER" | "CLEARCML" | "FUNC",
   ) {
-    await this.send(`RST ${type}`);
+    await this.send(0, `RST ${type}`);
   }
 
   /**
@@ -405,6 +433,6 @@ export class CharaDevice {
    * This is useful for debugging when there is a suspected heap or stack issue.
    */
   async getRamBytesAvailable(): Promise<number> {
-    return Number(await this.send("RAM"));
+    return Number(await this.send(1, "RAM").then(([bytes]) => bytes));
   }
 }

src/lib/serial/keymap-codes.ts

@@ -2,7 +2,7 @@ import type { ActionInfo, KeymapCategory } from "$lib/assets/keymaps/keymap";
 
 export interface KeyInfo extends Partial<ActionInfo> {
   code: number;
-  category: KeymapCategory;
+  category?: KeymapCategory;
 }
 
 export const KEYMAP_CATEGORIES = (await Promise.all(
@@ -11,7 +11,7 @@ export const KEYMAP_CATEGORIES = (await Promise.all(
   ),
 )) as KeymapCategory[];
 
-export const KEYMAP_CODES: Record<number, KeyInfo> = Object.fromEntries(
+export const KEYMAP_CODES = new Map<number, KeyInfo>(
   KEYMAP_CATEGORIES.flatMap((category) =>
     Object.entries(category.actions).map(([code, action]) => [
       Number(code),
@@ -20,7 +20,7 @@ export const KEYMAP_CODES: Record<number, KeyInfo> = Object.fromEntries(
   ),
 );
 
-export const KEYMAP_KEYCODES: Map<string, number> = new Map(
+export const KEYMAP_KEYCODES = new Map<string, number>(
   KEYMAP_CATEGORIES.flatMap((category) =>
     Object.entries(category.actions).map(
       ([code, action]) => [action.keyCode!, Number(code)] as const,
@@ -28,7 +28,7 @@ export const KEYMAP_KEYCODES: Map<string, number> = new Map(
   ).filter(([keyCode]) => keyCode !== undefined),
 );
 
-export const KEYMAP_IDS: Map<string, KeyInfo> = new Map(
+export const KEYMAP_IDS = new Map<string, KeyInfo>(
   KEYMAP_CATEGORIES.flatMap((category) =>
     Object.entries(category.actions).map(
       ([code, action]) =>

src/lib/serial/sem-ver.ts

@@ -14,9 +14,9 @@ export class SemVer {
       console.error("Invalid version string:", versionString);
     } else {
       const [, major, minor, patch, preRelease, meta] = result;
-      this.major = Number.parseInt(major);
+      this.major = Number.parseInt(major ?? "NaN");
-      this.minor = Number.parseInt(minor);
+      this.minor = Number.parseInt(minor ?? "NaN");
-      this.patch = Number.parseInt(patch);
+      this.patch = Number.parseInt(patch ?? "NaN");
       if (preRelease) this.preRelease = preRelease;
       if (meta) this.meta = meta;
     }

src/lib/serial/tauri-serial.ts

@@ -40,7 +40,6 @@ function NativeSerialPort(info: SerialPortInfo): TauriSerialPort {
 }
 
 // @ts-expect-error polyfill
-// noinspection JSConstantReassignment
 navigator.serial = {
   async getPorts(): Promise<SerialPort[]> {
     return invoke<any[]>("plugin:serial|get_serial_ports").then((ports) =>
@@ -69,6 +68,7 @@ navigator.serial = {
       props: { ports },
     });
     const port = await new Promise<SerialPort>((resolve) =>
+      // @ts-expect-error polyfill
       dialog.$on("confirm", resolve),
     );
     dialog.$destroy();

src/lib/serial/updater.ts

@@ -1,12 +0,0 @@
-export async function updateDevice(port: SerialPort) {
-  await port.open({
-    baudRate: 115200,
-    dataBits: 8,
-    stopBits: 1,
-    parity: "none",
-    bufferSize: 255,;
-  })
-
-  const writer = port.writable!.getWriter()
-  const reader = port.readable!.getReader()
-}

src/lib/serialization/actions.ts

@@ -23,9 +23,9 @@ export function compressActions(actions: number[]): Uint8Array {
 export function decompressActions(raw: Uint8Array): number[] {
   const actions: number[] = [];
   for (let i = 0; i < raw.length; i++) {
-    let action = raw[i];
+    let action = raw[i]!;
-    if (action > 0 && action < 32) {
+    if (action > 0 && action < 32 && i + 1 < raw.length) {
-      action = (action << 8) | raw[++i];
+      action = (action << 8) | raw[++i]!;
     }
     actions.push(action);
   }

src/lib/setting.ts

@@ -16,7 +16,7 @@ export const setting: Action<
 
   const unsubscribe = settings.subscribe(async (settings) => {
     if (id in settings) {
-      const { value, isApplied } = settings[id];
+      const { value, isApplied } = settings[id]!;
       if (type === "number") {
         node.value = (
           inverse !== undefined

src/lib/share.ts

@@ -10,7 +10,7 @@ export function triggerShare(event: Event) {
 }
 
 export const share: Action<Window, (event: Event) => void> = (
-  node,
+  _node,
   callback: (event: Event) => void,
 ) => {
   setCanShare.set(true);

src/lib/undo-redo.ts

@@ -60,7 +60,7 @@ export const overlay = derived(changes, (changes) => {
   for (const change of changes) {
     switch (change.type) {
       case ChangeType.Layout:
-        overlay.layout[change.layer].set(change.id, change.action);
+        overlay.layout[change.layer]?.set(change.id, change.action);
         break;
       case ChangeType.Chord:
         overlay.chords.set(JSON.stringify(change.id), {
@@ -92,8 +92,8 @@ export const layout = derived([overlay, deviceLayout], ([overlay, layout]) =>
   layout.map(
     (actions, layer) =>
       actions.map<KeyInfo>((action, id) => ({
-        action: overlay.layout[layer].get(id) ?? action,
+        action: overlay.layout[layer]?.get(id) ?? action,
-        isApplied: !overlay.layout[layer].has(id),
+        isApplied: !overlay.layout[layer]?.has(id),
       })) as [KeyInfo, KeyInfo, KeyInfo],
   ),
 );
@@ -118,7 +118,7 @@ export const chords = derived([overlay, deviceChords], ([overlay, chords]) => {
       return {
         id: chord.actions,
         // use the old phrase for stable editing
-        sortBy: chord.phrase.map((it) => KEYMAP_CODES[it]?.id ?? it).join(),
+        sortBy: chord.phrase.map((it) => KEYMAP_CODES.get(it)?.id ?? it).join(),
         actions: changedChord.actions,
         phrase: changedChord.phrase,
         actionsChanged: id !== JSON.stringify(changedChord.actions),
@@ -130,7 +130,7 @@ export const chords = derived([overlay, deviceChords], ([overlay, chords]) => {
     } else {
       return {
         id: chord.actions,
-        sortBy: chord.phrase.map((it) => KEYMAP_CODES[it]?.id ?? it).join(),
+        sortBy: chord.phrase.map((it) => KEYMAP_CODES.get(it)?.id ?? it).join(),
         actions: chord.actions,
         phrase: chord.phrase,
         phraseChanged: false,

src/routes/ConnectionPopup.svelte

@@ -23,16 +23,6 @@
     powerDialog = false;
   }
 
-  async function updateFirmware() {
-    const { usbVendorId: vendorId, usbProductId: productId } =
-      $serialPort!.portInfo;
-    $serialPort!.bootloader();
-    await new Promise((resolve) => setTimeout(resolve, 1000));
-    console.log(
-      await navigator.usb.requestDevice({ filters: [{ vendorId, productId }] }),
-    );
-  }
-
   let rebootInfo = false;
   let terminal = false;
   let powerDialog = false;

src/routes/EditActions.svelte

@@ -32,12 +32,13 @@
   }
 
   function redo() {
-    const [change, ...queue] = redoQueue;
+    const change = redoQueue.shift();
+    if (change) {
       changes.update((it) => {
         it.push(change);
         return it;
       });
-    redoQueue = queue;
+    }
   }
   let redoQueue: Change[] = [];
 
@@ -57,7 +58,7 @@
                 $LL.configure.chords.conflict.TITLE(),
                 $LL.configure.chords.conflict.DESCRIPTION(
                   actions
-                    .map((it) => `<kbd>${KEYMAP_CODES[it].id}</kbd>`)
+                    .map((it) => `<kbd>${KEYMAP_CODES.get(it)?.id}</kbd>`)
                     .join(" "),
                 ),
                 $LL.configure.chords.conflict.CONFIRM(),

src/routes/Footer.svelte

@@ -68,6 +68,7 @@
     {/if}
     <SyncOverlay />
   </div>
+  "check:watch": "svelte-kit sync && svelte-check --tsconfig ./jsconfig.json --watch",
   <ul>
     <li class="hide-forced-colors">
       <input

src/routes/config/chords/+page.svelte

@@ -37,7 +37,7 @@
         index.add(
           i,
           chord.phrase
-            .map((it) => KEYMAP_CODES[it]?.id)
+            .map((it) => KEYMAP_CODES.get(it)?.id)
             .filter((it) => !!it)
             .join(""),
         );
@@ -51,7 +51,9 @@
   function search(event: Event) {
     const query = (event.target as HTMLInputElement).value;
     searchFilter.set(
-      query && searchIndex ? searchIndex.search(query) : undefined,
+      query && searchIndex
+        ? (searchIndex.search(query) as number[])
+        : undefined,
     );
     page = 0;
   }
@@ -131,10 +133,12 @@
       >
     {/if}
     {#if $lastPage !== -1}
-      {#each $items.slice(page * $pageSize - (page === 0 ? 0 : 1), (page + 1) * $pageSize - 1) as [chord] (JSON.stringify(chord.id))}
+      {#each $items.slice(page * $pageSize - (page === 0 ? 0 : 1), (page + 1) * $pageSize - 1) as [chord] (JSON.stringify(chord?.id))}
+        {#if chord}
           <tr>
             <ChordEdit {chord} />
           </tr>
+        {/if}
       {/each}
     {:else}
       <caption>{$LL.configure.chords.search.NO_RESULTS()}</caption>

src/routes/config/chords/ChordActionEdit.svelte

@@ -51,6 +51,7 @@
       });
       return changes;
     });
+    return undefined;
   }
 
   function addSpecial(event: MouseEvent) {

src/routes/config/chords/ChordEdit.svelte

@@ -59,7 +59,7 @@
       onHidden(instance) {
         instance.destroy();
       },
-      onDestroy(instance) {
+      onDestroy(_instance) {
         shareComponent.$destroy();
       },
     }).show();

src/routes/plugin/example-plugin.js

@@ -1,3 +1,4 @@
+// @ts-nocheck
 /*******************************
  * HOLD UP AND READ THIS FIRST *
  *******************************

src/routes/sandbox/+page.svelte

@@ -1,4 +1,5 @@
 <script>
+  // @ts-nocheck
   let ongoingRequest;
   let resolveRequest;
   let source;

src/routes/vocabulary/+page.svelte

@@ -48,18 +48,18 @@
       if (next.length === 0) {
         next = Array.from(
           { length: 5 },
-          () => $chords[Math.floor(Math.random() * $chords.length)],
+          () => $chords[Math.floor(Math.random() * $chords.length)]!,
         );
       } else {
         next.shift();
-        next.push($chords[Math.floor(Math.random() * $chords.length)]);
+        next.push($chords[Math.floor(Math.random() * $chords.length)]!);
         next = next;
       }
     }
     if (
       userInput ===
-      next[0].phrase
+      next[0]!.phrase
-        .map((it) => (it === 32 ? " " : KEYMAP_CODES[it]!.id))
+        .map((it) => (it === 32 ? " " : KEYMAP_CODES.get(it)!.id))
         .join("") +
         " "
     ) {

src/tools/minify-icon-font.js

@@ -69,7 +69,7 @@ for (const icon of icons) {
     .flatMap((it) => [...it])
     .map((it) => it.codePointAt(0).toString(16));
 
-  const codePoint = config.codePoints[icon];
+  const codePoint = config.codePoints[icon ?? ""];
   if (codePoint) {
     glyphs.push(codePoint);
   } else if (codePoints.length === 0) {

tsconfig.json

@@ -4,6 +4,14 @@
     "allowJs": true,
     "checkJs": true,
     "esModuleInterop": true,
+    "noImplicitOverride": true,
+    "noFallthroughCasesInSwitch": true,
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "noPropertyAccessFromIndexSignature": true,
+    "noUncheckedIndexedAccess": true,
+    "noUnusedLocals": true,
+    "noUnusedParameters": true,
     "forceConsistentCasingInFileNames": true,
     "resolveJsonModule": true,
     "skipLibCheck": true,

vite.config.ts

@@ -16,11 +16,11 @@ const { homepage, bugs, repository } = JSON.parse(
   ),
 );
 
-process.env.VITE_HOMEPAGE_URL = repository.url.replace(/\.git$/, "");
+process.env["VITE_HOMEPAGE_URL"] = repository.url.replace(/\.git$/, "");
-process.env.VITE_DOCS_URL = homepage;
+process.env["VITE_DOCS_URL"] = homepage;
-process.env.VITE_BUGS_URL = bugs.url;
+process.env["VITE_BUGS_URL"] = bugs.url;
-process.env.VITE_LEARN_URL = "https://www.iq-eq.io/";
+process.env["VITE_LEARN_URL"] = "https://www.iq-eq.io/";
-process.env.VITE_LATEST_FIRMWARE = "1.1.3";
+process.env["VITE_LATEST_FIRMWARE"] = "1.1.3";
 
 export default defineConfig({
   build: {