Switch from rollup to vite, from commonjs to ecmascript modules

[flevi29]

Pull Request

Related issue

Fixes #1626
Waiting on #1739

What does this PR do?

• switches bundler from rollup to vite, which internally uses rollup, but makes things a lot shorter and simpler
  • removes the need for separate vitest.config.js
  • removes the need for scripts/file-size.js, packages kleur, pretty-bytes, brotli-size, gzip-size, as it prints sizes by default
  • removes the need for all of the rollup plugins and dependencies (@rollup/plugin-terser, @babel/core, @babel/preset-env, @rollup/plugin-babel, @rollup/plugin-commonjs, @rollup/plugin-json, @rollup/plugin-node-resolve, rollup-plugin-typescript2)
  • removes the need for shx package, and cleanup script, as it clears dist itself
• switches from CJS to ESM ("type": "module")
  • every .js project file now needs to be written in ESM syntax, the web standard syntax
  • TypeScript files were already written in ESM syntax, so this just makes things more straight forward
• updates TypeScript and makes some changes to tsconfig.json according to https://www.typescriptlang.org/docs/handbook/modules/guides/choosing-compiler-options.html#im-writing-a-library
  • is now used to transpile ESM version of this package
  • most importantly sets module to node16 and verbatimModuleSyntax to true, this requires changes to all TypeScript files so they may be compatible with the web standard ESM
    • all imported files now require a .js extension
    • there is no more support for index directory imports, as that is only a Node.js thing, the web doesn't support it
    • when importing types, we need to explicitly specify that we're doing so with the type keyword

Caution

• BREAKING: remove default export
  • https://rollupjs.org/es-module-syntax/#default-export
  • Question regarding mixing default and named exports rollup/rollup#1961 (comment)
  • https://blog.neufund.org/why-we-have-banned-default-exports-and-you-should-do-the-same-d51fdc2cf2ad

Old

import MeiliSearch from "meilisearch";

New

import { MeiliSearch } from "meilisearch";

Caution

• BREAKING: UMD bundle no longer extends window/global/globalThis/self with the exports, instead it extends it with property meilisearch which contains the exports

Old

<script>
  const client = new MeiliSearch(/* ... */);
</script>

New

<script>
  const client = new meilisearch.MeiliSearch(/* ... */);
</script>

PR checklist

Please check if your PR fulfills the following requirements:

• Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
• Have you read the contributing guidelines?
• Have you made sure that the title is accurate and descriptive of the changes?

Thank you so much for contributing to Meilisearch!

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.80%. Comparing base (bc97969) to head (e8911e7).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1740      +/-   ##
==========================================
+ Coverage   97.55%   97.80%   +0.25%     
==========================================
  Files          20       16       -4     
  Lines        1513     1461      -52     
  Branches      319      306      -13     
==========================================
- Hits         1476     1429      -47     
+ Misses         37       32       -5     

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[flevi29]

EXPLAINER: These are no longer required, as exports below contains the types, and TypeScript primarily looks there.