Error handling, export-index.html, and ESLint

.eslintrc.json

@@ -0,0 +1,49 @@
+{
+    "plugins": ["import"],
+    "env": {
+        "browser": true,
+        "es2021": true
+    },
+    "extends": [
+        "standard-with-typescript",
+        "plugin:import/recommended",
+        "plugin:import/typescript"
+    ],
+    "parserOptions": {
+        "ecmaVersion": "latest",
+        "sourceType": "module"
+    },
+    "rules": {
+        "@typescript-eslint/explicit-function-return-type": "off",
+        "@typescript-eslint/quotes": ["error", "double"],
+        "@typescript-eslint/semi": ["error", "always"],
+        "@typescript-eslint/space-before-function-paren": ["error", {
+            "anonymous": "never",
+            "named": "never",
+            "asyncArrow": "always"
+        }],
+        "@typescript-eslint/member-delimiter-style": ["error", {
+            "multiline": { "delimiter": "comma", "requireLast": true },
+            "singleline": { "delimiter": "comma", "requireLast": false },
+            "multilineDetection": "brackets"
+          }
+        ],
+        "@typescript-eslint/no-misused-promises": ["error", { "checksVoidReturn": false }],
+        "@typescript-eslint/no-non-null-assertion": "off",
+        "@typescript-eslint/comma-dangle": ["error", "always-multiline"],
+        "import/no-unresolved": "error",
+        "import/order": ["error", {
+            "newlines-between": "always"
+        }]
+    },
+    "settings": {
+        "import/parsers": {
+            "@typescript-eslint/parser": [".ts", ".tsx"]
+        },
+        "import/resolver": {
+            "typescript": {
+                "alwaysTryTypes": true
+            }
+        }
+      }
+}

.vscode/extensions.json

@@ -0,0 +1,13 @@
+{
+	// See https://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"dbaeumer.vscode-eslint"
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": [
+
+	]
+}