[Proof of concept] The ultimate TypeScript setup rework #1975
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This reverts commit 5c5c972. Reverted for the cae a different suggestion with a fix for that script is accepted.
Fixes type errors revealed after enabling useUnknownInCatchVariables
The checkJs TSConfig option will be used instead. (Most of the directives were misplaced anyway.)
In the test file, an aggregating import (import * as commander) was used to allegedly import the default export. That is not the same as actually importing the default export (import commander). Fixing the import revealed the following error: TS1192: Module '".../commander.js/typings/index"' has no default export. The reason is that the default export is not publicly declared because it is deprecated, and so should not be used. The test was therefore unnecessary.
The aggregated import (import * as commander) doesn't deliver all expected functions when "esModuleInterop": true is set in TSConfig, including when set implicitly because "module" is set to "node16" or "nodenext", like is now the case in our TSConfig after the last commit. The new test block covers that.
- Generate typings automatically from JSDoc (npm run build) - Modularize TSConfig: use separate config files - for lib (with typings generation) - for Jest tests (with Jest types, checks are opt-in for now) - for tsd tests - Use project references in root TSConfig (so that only one tsc run is needed) - Remove typescript-checkJS script. Add typecheck, typecheck-jest and typecheck-all instead
Inspired by SvelteKit (https://github.com/sveltejs/kit) Motivation: - the entry points are indeed part of the library source code - simplifies lint:javascript script and files field in package.json - elimintates the need for "rootDir": ".." in TSConfig for lib (there are no more typings emitted for untracked JS files in the root directory, for example config files and files with quick tests/demos)
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The original, manually written typings are kept in the repo for now because they still have to be moved to JSDoc which currently differs from them in a lot of places.
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This was referenced Aug 15, 2023
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This is an interesting refactor, but not something I think we would adopt. If we went all-in on typing then I think it is more likely we would switch to TypeScript implementation. We do certainly have parallel JSDoc and TSDoc, but a benefit is tailoring the two interfaces separately. (Although I wouldn't recommend this in a new program!) |
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Core components of this PR
.d.tstypings automatically from JSDoc (see TypeScript docs) withnpm run buildlib, Jest tests and tsd tests)typescript-checkJSscript. Addtypecheck,typecheck-jestandtypecheck-allinstead (Jest tests are currently not included intypecheck)test-typingsscript now also includes a typecheckindex.jsandesm.mjstolibwhere they belong (tolib/exports, to be precise)@api privatewith@packagealthough unfortunately both mean nothing to TypeScript, more information at On@apiJSDoc tag #1949Why generate
.d.tsfrom JSDoc?.d.tsand JSDoc like currently.d.ts.d.tsis required@packageoutside Commander is not prevented by TypeScript, but that has little to do with this PR. See #1949 (comment) for detailsTODO
.d.ts.d.tsfiles to `.gitignore? (Svelte does that for example)See also