Set every return type in every function just to deal with webassm

package.json

@@ -16,6 +16,7 @@
     "@babel/core": "^7.25.2",
     "@babel/preset-env": "^7.25.4",
     "@babel/preset-typescript": "^7.24.7",
+    "assemblyscript": "^0.27.29",
     "babel-loader": "^9.1.3",
     "http-server": "^14.1.1",
     "ts-loader": "^9.5.1",
@@ -23,5 +24,11 @@
     "webpack": "^5.94.0",
     "webpack-cli": "^5.1.4",
     "webpack-dev-server": "^5.0.4"
+  },
+  "exports": {
+    ".": {
+      "import": "./build/release.js",
+      "types": "./build/release.d.ts"
+    }
   }
 }

src/audio.ts

@@ -12,7 +12,7 @@ class Chip8Audio {
 		this.volume = 0.1;
 	}
 
-	startAudio(audioContext: AudioContext, volume: number) {
+	startAudio(audioContext: AudioContext, volume: number): void{
 		this.volume = volume;
 		this.audioBrowserContext = audioContext;
 		this.gainNode = this.audioBrowserContext.createGain();
@@ -20,7 +20,7 @@ class Chip8Audio {
 		this.gainNode.gain.setValueAtTime(this.volume, this.audioBrowserContext.currentTime);
 	}
 
-	startBeep() {
+	startBeep(): void {
 		if(this.oscillator == null && this.audioBrowserContext && this.gainNode) {
 			this.oscillator = this.audioBrowserContext.createOscillator();
 			this.oscillator.type = 'square';
@@ -30,7 +30,7 @@ class Chip8Audio {
 		}
 	}
 
-	stopBeep() {
+	stopBeep(): void {
 		if(this.oscillator) {
 			this.oscillator.stop();
 			this.oscillator = null;

src/chip8Emulator.ts

@@ -6,7 +6,7 @@ import Chip8Audio from './audio'
 class Chip8Emulator {
 	cpu: CPU;
 	keyboard: Keyboard;
-	rom: Uint8Array;
+	rom: Uint8Array | null;
 	audio: Chip8Audio;
 
 	romLoaded: boolean;
@@ -17,21 +17,21 @@ class Chip8Emulator {
 		this.cpu = new CPU(this.keyboard, this.audio);
 		
 
-		this.rom = new Uint8Array();
+		this.rom = null;
 		this.romLoaded = false;
 	}
 
-	loadRom(rom: Uint8Array) {
+	loadRom(rom: Uint8Array): void {
 		this.rom = rom;
 		this.cpu.loadRom(this.rom);
 		this.romLoaded = true;
 	}
 
-	isRomLoaded() {
+	isRomLoaded(): boolean {
 		return this.romLoaded;
 	}
 
-	emulateCycle() {
+	emulateCycle():void {
 		this.cpu.cycle();
 	}
 
@@ -39,7 +39,7 @@ class Chip8Emulator {
 		return this.cpu.getCPUStatus();
 	}
 
-	drawToCanvas(canvas: HTMLCanvasElement, size: number) {
+	drawToCanvas(canvas: HTMLCanvasElement, size: number): void {
 		let ctx = canvas.getContext('2d') as CanvasRenderingContext2D;
 		let width = 64*size;
 		let height = 32*size;
@@ -61,19 +61,19 @@ class Chip8Emulator {
 		}
 	}
 
-	setUserKey(userKey: number, key: number) {
+	setUserKey(userKey: number, key: number): void {
 		this.keyboard.setUserKey(userKey, key);
 	}
 
-	startAudio(audioContext: AudioContext, volume: number) {
+	startAudio(audioContext: AudioContext, volume: number): void {
 		this.audio.startAudio(audioContext, volume);
 	}
 
-	keyDownEvent(key: number) {
+	keyDownEvent(key: number): void {
 		this.keyboard.userKeyPressedDown(key);
 	}
 
-	keyUpEvent(key: number) {
+	keyUpEvent(key: number): void {
 		this.keyboard.userKeyPressedUp(key);
 	}
 }

src/cpu.ts

@@ -54,7 +54,7 @@ class CPU {
 		this.setupFont();
 	}
 
-	clearRegisters() {
+	clearRegisters(): void {
 		this.regs.fill(0);
 		this.pc = 0x200; // Start of the program on normal programs
 		this.indexReg = 0;
@@ -65,16 +65,16 @@ class CPU {
 		this.rng = new RNG(0);
 	}
 
-	clearMemory() {
+	clearMemory(): void {
 		this.memory.fill(0);
 	}
 
-	clearDisplay() {
+	clearDisplay(): void {
 		this.displayMemory.fill(0);
 	}
 
 
-	private setupFont() {
+	private setupFont(): void {
 		// Using address from 050 - 09F
 		let addressFont = 0x050;
 		
@@ -101,9 +101,8 @@ class CPU {
 		this.memory.set(characters, addressFont);
 	}
 
-	public loadRom(rom: Uint8Array) {
+	public loadRom(rom: Uint8Array): void {
 		// Loads a ROM into starting PC address
-		console.log(rom);
 		for(let i = 0; i < rom.length; i++) {
 			this.memory[this.pc+i] = rom[i];
 		}
@@ -130,11 +129,11 @@ class CPU {
 		return status;
 	}
 
-	private incrementPC() {
+	private incrementPC(): void {
 		this.pc += 2;
 	}
 	
-	public cycle() {
+	public cycle(): void {
 		// Fetch opcode
 		let firstOpcode: number = this.memory[this.pc];
 		let secondOpcode: number = this.memory[this.pc + 1];

src/keyboard.ts

@@ -18,22 +18,22 @@ class Keyboard {
 		this.userKeyboardMap = new Map<number, number>();
 	}
 
-	private setKey(key: number, pressed: boolean) {
+	private setKey(key: number, pressed: boolean): void {
 		this.keys[key] = pressed ? 1 : 0;
 	}
 
-	public setUserKey(userKey: number, key: number) {
+	public setUserKey(userKey: number, key: number): void {
 		this.userKeyboardMap.set(userKey, key);
 	}
 
-	public userKeyPressedDown(userKey: number) {
-		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
-		if(keyVal != -1) this.setKey(keyVal, true);
+	public userKeyPressedDown(userKey: number): void {
+		let keyVal: number | undefined = this.userKeyboardMap.get(userKey);
+		if(keyVal) this.setKey(keyVal, true);
 	}
 
-	public userKeyPressedUp(userKey: number) {
-		let keyVal: number = this.userKeyboardMap.get(userKey) ?? -1;
-		if(keyVal != -1) this.setKey(keyVal, false);
+	public userKeyPressedUp(userKey: number): void {
+		let keyVal: number | undefined = this.userKeyboardMap.get(userKey);
+		if(keyVal) this.setKey(keyVal, false);
 	}
 }