Why does compilerOptions.lib include esnext?

[hyunbinseo]

Vite v4's default build / browser target is as follows.

['es2020', 'edge88', 'firefox78', 'chrome87', 'safari14']

SvelteKit's generated ./.svelte-kit/tsconfig.json's compilerOptions.lib includes esnext.

{
  "compilerOptions": {
    "lib": ["esnext", "DOM", "DOM.Iterable"]
  }
}

Wouldn't it be safer to match tsconfig's compilerOptions.lib to Vite's build.target?

Vite only handles syntax transforms and does not cover polyfills by default.

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(If matched) For example, trying to use ES2021's Promise.any would show an error in VS Code.

Property 'any' does not exist on type 'PromiseConstructor'. Do you need to change your target library? Try changing the 'lib' compiler option to 'es2021' or later.