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{
"compilerOptions": {
// Most non-library projects don't need to emit declarations.
// So we add this option by default to make the config more friendly to most users.
"noEmit": true,
// As long as you are using a build tool, we recommend you to author and ship in ES modules.
// Even if you are targeting Node.js, because
// - `CommonJS` is too outdated
// - the ecosystem hasn't fully caught up with `Node16`/`NodeNext`
// This recommendation includes environments like Vitest, Vite Config File, Vite SSR, etc.
"module": "ESNext",
// We expect users to use bundlers.
// So here we enable some resolution features that are only available in bundlers.
"moduleResolution": "bundler",
"resolveJsonModule": true,
"allowImportingTsExtensions": true,
// Even files without `import` or `export` are treated as modules.
// It helps to avoid mysterious errors such as `Cannot redeclare block-scoped variable 'name`.
// https://www.totaltypescript.com/cannot-redeclare-block-scoped-variable#solution-3-your-module-isnt-a-module
"moduleDetection": "force",
// Required in Vue projects
"jsx": "preserve",
"jsxImportSource": "vue",
// `"noImplicitThis": true` is part of `strict`
// Added again here in case some users decide to disable `strict`.
// This enables stricter inference for data properties on `this`.
"noImplicitThis": true,
"strict": true,
// See <https://www.semver-ts.org/formal-spec/5-compiler-considerations.html#strictness>
// These 2 options are also part of the recommended tsconfig as of TS 5.9
"noUncheckedIndexedAccess": true,
// Commented out for now. It's hard to land in the current ecosystem.
// Needs more consensus before moving forward.
// "exactOptionalPropertyTypes": true,
// <https://devblogs.microsoft.com/typescript/announcing-typescript-5-0/#verbatimmodulesyntax>
// Any imports or exports without a type modifier are left around. This is important for `<script setup>`.
// Anything that uses the type modifier is dropped entirely.
"verbatimModuleSyntax": true,
// A few notes:
// - Vue 3 supports ES2016+
// - For Vite, the actual compilation target is determined by the
// `build.target` option in the Vite config.
// So don't change the `target` field here. It has to be
// at least `ES2020` for dynamic `import()`s and `import.meta` to work correctly.
// - If you are not using Vite, feel free to overwrite the `target` field.
"target": "ESNext",
// For spec compliance.
// `true` by default if the `target` is `ES2020` or higher.
// Explicitly set it to `true` here in case some users want to overwrite the `target`.
"useDefineForClassFields": true,
// Recommended
"esModuleInterop": true,
"forceConsistentCasingInFileNames": true,
"libReplacement": false,
// See <https://github.com/vuejs/vue-cli/pull/5688>
"skipLibCheck": true,
}
}