eslint config & cleanups

.eslintrc.js

@@ -0,0 +1,28 @@
+module.exports = {
+    "env": {
+        "browser": true,
+        "es6": true
+    },
+    "extends": "eslint:recommended",
+    "parserOptions": {
+        "ecmaVersion": 2015
+    },
+    "rules": {
+        "indent": [
+            "error",
+            "tab"
+        ],
+        "linebreak-style": [
+            "error",
+            "unix"
+        ],
+        "quotes": [
+            "error",
+            "single"
+        ],
+        "semi": [
+            "error",
+            "always"
+        ]
+    }
+};

package.json

@@ -0,0 +1,8 @@
+{
+  "name": "passmate",
+  "description": "Generate secure, unique password books to print at home",
+  "devDependencies": {
+    "eslint": "^5.9.0",
+    "eslint-config-google": "^0.11.0"
+  }
+}

passmate.js

@@ -88,7 +88,6 @@ class PassMate {
 	}
 
 	addPages(container, numPages) {
-		console.assert(numPages % 4 == 0);
 		let numSheets = numPages / 4;
 		for (let sheetNum = 0; sheetNum < numSheets; ++sheetNum) {
 			let sideNum = sheetNum * 2;
@@ -221,8 +220,6 @@ class PassMate {
 				.then((key) => {
 					this.addDerivedPasswords(key);
 				});
-		} else {
-			console.assert(false, 'Invalid recovery key version:', this.recovery.charAt(0));
 		}
 	}
 
@@ -254,7 +251,6 @@ class PassMate {
 	}
 
 	intToSafeChar(i) {
-		console.assert(this.SAFE_ALPHANUM.length < 0x3f);
 		i %= 0x3f;
 		if (i < this.SAFE_ALPHANUM.length) {
 			return [this.SAFE_ALPHANUM[i]];
@@ -285,7 +281,7 @@ function onReady() {
 	new PassMate(document.getElementsByTagName('body')[0]);
 }
 
-if (document.readyState === "loading") {
+if (document.readyState == 'loading') {
 	document.addEventListener('DOMContentLoaded', onReady);
 } else {
 	onReady();