Start migrating to Svelte 5

.eslintrc.yml

@@ -0,0 +1,76 @@
+{
+  "env": { "browser": true, "es2024": true, "node": true },
+  "extends":
+    [
+      "eslint:recommended",
+      "plugin:@typescript-eslint/recommended",
+      "airbnb-base",
+      "plugin:svelte/recommended",
+      "plugin:unicorn/recommended",
+      "plugin:prettier/recommended",
+    ],
+  "ignorePatterns": ["*.cjs"],
+  "overrides":
+    [
+      {
+        "files": ["*.svelte"],
+        "parser": "svelte-eslint-parser",
+        "parserOptions": { "parser": "@typescript-eslint/parser" },
+      },
+    ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions":
+    { "ecmaVersion": 2019, "requireConfigFile": false, "sourceType": "module" },
+  "plugins": ["@typescript-eslint", "unicorn"],
+  "rules": {
+      "@typescript-eslint/no-inferrable-types": 0,
+      "@typescript-eslint/no-shadow": 2,
+      "@typescript-eslint/no-unused-vars": [1, { "argsIgnorePattern": "^_" }],
+      "@typescript-eslint/quotes": 0,
+      "brace-style": [1, "1tbs"],
+      "camelcase": 1,
+      "comma-dangle": [1, "always-multiline"],
+      "curly": [1, "multi-line"],
+      "eol-last": 1,
+      "eqeqeq": [2, "always", { "null": "ignore" }],
+      "import/extensions": 0,
+      "import/first": 0,
+      "import/no-extraneous-dependencies": 0,
+      "import/no-mutable-exports": 0,
+      "import/no-unresolved": 0,
+      "import/order": 0,
+      "import/prefer-default-export": 0,
+      "linebreak-style": 0,
+      "max-len": 0,
+      "no-console": [1, { "allow": ["warn", "error"] }],
+      "no-constant-condition": 2,
+      "no-implicit-coercion": 2,
+      "no-multiple-empty-lines": 0,
+      "no-param-reassign": 0,
+      "no-restricted-syntax": 0,
+      "no-shadow": 0,
+      "no-trailing-spaces": [1, { "skipBlankLines": true }],
+      "no-unused-vars": 1,
+      "no-var": 2,
+
+      # TODO: Enable the svelte version of this rule: https://github.com/sveltejs/eslint-plugin-svelte/pull/806
+      "prefer-const": 0,
+
+      "prefer-destructuring": 0,
+      "quote-props": [1, "consistent"],
+      "quotes": 0,
+      "semi": 1,
+      "unicorn/explicit-length-check": 0,
+      "unicorn/filename-case": 0,
+      "unicorn/no-array-callback-reference": 0,
+      "unicorn/no-await-expression-member": 0,
+      "unicorn/no-document-cookie": 0,
+      "unicorn/no-null": 0,
+      "unicorn/prefer-add-event-listener": 0,
+      "unicorn/prefer-dom-node-dataset": 0,
+      "unicorn/prefer-string-replace-all": 0,
+      "unicorn/prefer-top-level-await": 0,
+      "unicorn/prevent-abbreviations": 0,
+    },
+  "settings": { "svelte3/typescript": true },
+}

.github/workflows/lint.yml

@@ -14,6 +14,6 @@ jobs:
         with:
           node-version-file: ".nvmrc"
       - name: Install dependencies
-        run: npm ci
+        run: npm ci --force
       - name: Lint
         run: npm run lint

.github/workflows/test.yml

@@ -14,7 +14,7 @@ jobs:
         with:
           node-version-file: ".nvmrc"
       - name: Install dependencies
-        run: npm ci
+        run: npm ci --force
       - name: Build app
         run: npm run build
       - name: Install Playwright