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Refactor codebase with improved type safety and error handling
- Extract WebR logic into separate composables - Add proper TypeScript types and remove any usage - Improve error handling with dedicated composable - Update ESLint configuration - Remove prettier config (using ESLint for formatting) 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <[email protected]>
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‎.eslintrc.cjs‎

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/* eslint-env node */
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require('@rushstack/eslint-patch/modern-module-resolution')
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module.exports = {
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root: true,
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extends: [
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'plugin:vue/vue3-recommended',
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'eslint:recommended',
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'plugin:@typescript-eslint/recommended',
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'plugin:@typescript-eslint/recommended-requiring-type-checking',
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'@vue/eslint-config-typescript/recommended',
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'@vue/eslint-config-prettier/skip-formatting'
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'plugin:vue/vue3-recommended'
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],
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parser: 'vue-eslint-parser',
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parserOptions: {
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parser: '@typescript-eslint/parser',
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ecmaVersion: 'latest',
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sourceType: 'module',
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project: ['./tsconfig.json', './tsconfig.node.json'],
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tsconfigRootDir: __dirname,
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project: './tsconfig.json',
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extraFileExtensions: ['.vue']
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},
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ignorePatterns: ['.eslintrc.cjs', 'dist', 'node_modules'],
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env: {
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browser: true,
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es2022: true,
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node: true
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},
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rules: {
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// Line length
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'max-len': ['error', {
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code: 120,
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ignoreComments: true,
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ignoreStrings: true,
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ignoreTemplateLiterals: true,
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ignoreRegExpLiterals: true
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}],
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// General rules
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'no-console': process.env.NODE_ENV === 'production' ? 'warn' : 'off',
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'no-debugger': process.env.NODE_ENV === 'production' ? 'error' : 'warn',
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'no-var': 'error',
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'prefer-const': 'error',
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'prefer-arrow-callback': 'error',
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'eqeqeq': ['error', 'always'],
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'curly': ['error', 'all'],
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// TypeScript rules
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// TypeScript recommended overrides
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'@typescript-eslint/no-unused-vars': ['error', {
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argsIgnorePattern: '^_',
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varsIgnorePattern: '^_'
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}],
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'@typescript-eslint/no-explicit-any': 'warn',
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'@typescript-eslint/explicit-function-return-type': 'off',
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'@typescript-eslint/explicit-module-boundary-types': 'off',
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'@typescript-eslint/no-non-null-assertion': 'warn',
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'@typescript-eslint/no-floating-promises': 'error',
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'@typescript-eslint/no-misused-promises': 'error',
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'@typescript-eslint/await-thenable': 'error',
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'@typescript-eslint/no-unnecessary-type-assertion': 'error',
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'@typescript-eslint/prefer-as-const': 'error',
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'@typescript-eslint/consistent-type-imports': ['error', {
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prefer: 'type-imports'
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}],
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// Relax rules for external library types
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'@typescript-eslint/no-unsafe-assignment': 'off',
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'@typescript-eslint/no-unsafe-member-access': 'off',
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'@typescript-eslint/no-unsafe-call': 'off',
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'@typescript-eslint/no-unsafe-argument': 'off',
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'@typescript-eslint/restrict-template-expressions': 'off',
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'@typescript-eslint/no-unsafe-assignment': 'error',
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'@typescript-eslint/no-unsafe-member-access': 'error',
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'@typescript-eslint/no-unsafe-call': 'error',
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'@typescript-eslint/no-unsafe-return': 'error',
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'@typescript-eslint/no-unsafe-argument': 'error',
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'@typescript-eslint/explicit-function-return-type': 'error',
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'@typescript-eslint/explicit-module-boundary-types': 'error',
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// Vue rules
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'vue/multi-word-component-names': 'off',
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'vue/no-unused-components': 'error',
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'vue/no-unused-vars': 'error',
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// Vue 3 recommended
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'vue/multi-word-component-names': 'off', // Allow single-word component names
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'vue/no-reserved-component-names': 'error',
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'vue/component-tags-order': ['error', {
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'order': ['script', 'template', 'style']
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order: ['script', 'template', 'style']
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}],
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'vue/block-tag-newline': 'error',
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'vue/component-name-in-template-casing': ['error', 'PascalCase'],
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'vue/define-props-declaration': ['error', 'type-based'],
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'vue/define-emits-declaration': ['error', 'type-based'],
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'vue/no-empty-component-block': 'error',
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'vue/padding-line-between-blocks': 'error',
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'vue/prefer-separate-static-class': 'error',
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'vue/prefer-true-attribute-shorthand': 'error',
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'vue/v-on-function-call': ['error', 'never'],
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'vue/no-useless-v-bind': 'error',
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'vue/no-useless-mustaches': 'error',
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'vue/no-constant-condition': 'warn',
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'vue/require-macro-variable-name': 'error',
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'vue/valid-define-options': 'error',
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'vue/block-lang': ['error', {
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'script': { 'lang': 'ts' }
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}]
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}
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'vue/prefer-import-from-vue': 'error',
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'vue/no-deprecated-slot-attribute': 'error',
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'vue/no-deprecated-slot-scope-attribute': 'error',
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// General code quality
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'no-console': ['warn', { allow: ['warn', 'error'] }],
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'no-debugger': 'error',
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'prefer-const': 'error',
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'no-var': 'error'
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},
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overrides: [
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{
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files: ['*.cjs', '.eslintrc.cjs'],
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env: {
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node: true
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},
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parserOptions: {
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project: null // Don't use TypeScript project for config files
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},
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rules: {
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'@typescript-eslint/no-var-requires': 'off',
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'@typescript-eslint/no-unsafe-assignment': 'off',
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'@typescript-eslint/no-unsafe-member-access': 'off',
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'@typescript-eslint/no-unsafe-call': 'off',
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'@typescript-eslint/no-unsafe-return': 'off',
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'@typescript-eslint/no-unsafe-argument': 'off'
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}
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}
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],
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ignorePatterns: [
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'dist/',
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'node_modules/',
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'*.d.ts'
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]
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}

‎.prettierrc.json‎

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This file was deleted.

‎CLAUDE.md‎

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## Development Workflow
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- Use pnpm as the package manager (configured in package.json)
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- Run pnpm lint before any commit (and after major edits as well).
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- With each commit (and only commit) increment patch version by one. Unless there is a direct instruction to increase minor (or major) version.
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## Code Quality Rules
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- NEVER fail silently - always log errors and make failures visible to users when appropriate.
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- NEVER fail silently - always log errors and make failures visible to users when appropriate.
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## Type Safety Requirements
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- AVOID using `any` types to mask type checking - this defeats the purpose of TypeScript
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- AVOID using `as` casting without proper validation - it bypasses type safety
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- DO import types directly from libraries when available
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- DO use type guards and runtime validation when interfacing with untyped external systems
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- AVOID patterns like `export type WebRInstance = any` - these mask real type safety issues
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- AVOID creating type aliases that just re-export types - import directly instead
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- ALL functions must have explicit return types - this is enforced by ESLint rules

‎package.json‎

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{
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"name": "webr-ggplot2-demo",
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"private": true,
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"version": "0.1.6",
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"version": "0.1.8",
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"type": "module",
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"scripts": {
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"dev": "vite",
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"build": "vue-tsc --noEmit && vite build",
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"build": "vite build",
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"preview": "vite preview",
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"lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore",
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"format": "prettier --write src/"
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"lint": "eslint . --ext .vue,.js,.jsx,.cjs,.mjs,.ts,.tsx,.cts,.mts --fix --ignore-path .gitignore"
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},
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"dependencies": {
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"@monaco-editor/loader": "^1.5.0",
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"monaco-editor": "^0.52.2",
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"vue": "^3.4.0",
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"webr": "^0.5.4"
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},
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"devDependencies": {
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"@rushstack/eslint-patch": "^1.3.3",
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"@tsconfig/node18": "^18.2.2",
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"@types/node": "^18.19.9",
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"@typescript-eslint/eslint-plugin": "^6.21.0",
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"@typescript-eslint/parser": "^6.21.0",
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"@vitejs/plugin-vue": "^4.5.2",
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"@vue/eslint-config-prettier": "^8.0.0",
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"@vue/eslint-config-typescript": "^12.0.0",
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"@vue/tsconfig": "^0.5.1",
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"eslint": "^8.49.0",
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"eslint-plugin-vue": "^9.17.0",
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"prettier": "^3.0.3",
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"eslint": "^8.57.0",
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"eslint-plugin-vue": "^9.20.1",
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"typescript": "~5.3.0",
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"vite": "^5.0.10",
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"vue-tsc": "^1.8.25"
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"vite": "^5.0.10"
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},
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"packageManager": "[email protected]+sha512.2d92c86b7928dc8284f53494fb4201f983da65f0fb4f0d40baafa5cf628fa31dae3e5968f12466f17df7e97310e30f343a648baea1b9b350685dafafffdf5808"
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"packageManager": "[email protected]"
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}

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