refactor: prepare code before release

.changeset/add-jsdoc-types.md

@@ -1,5 +1,5 @@
 ---
-"less-loader": patch
+"less-loader": minor
 ---
 
-Add JSDoc type annotations to `src/index.js` and `src/utils.js` so editors and downstream consumers get IntelliSense without a TypeScript toolchain.
+Added types.

.changeset/track-sync-loaded-dependencies.md

@@ -2,4 +2,4 @@
 "less-loader": patch
 ---
 
-Track files loaded synchronously by Less (e.g. `data-uri()` and custom functions installed via `@plugin`) as webpack file dependencies. Previously these reads were delegated to Less's default file manager and never registered with webpack, so persistent caching could keep a stale build when only the sync-loaded file changed. See [#492](https://github.com/webpack/less-loader/issues/492).
+Track files loaded synchronously by Less (e.g. `data-uri()` and custom functions installed via `@plugin`) as webpack file dependencies. See [#492](https://github.com/webpack/less-loader/issues/492).

.github/workflows/nodejs.yml

@@ -52,6 +52,12 @@ jobs:
       - name: Security audit
         run: npm run security
 
+      - name: Build types
+        run: npm run build:types
+
+      - name: Check types
+        run: if [ -n "$(git status types --porcelain)" ]; then echo "Missing types. Update types by running 'npm run build:types'"; exit 1; else echo "All types are valid"; fi
+
   test:
     name: Test - ${{ matrix.os }} - Node v${{ matrix.node-version }}, Webpack ${{ matrix.webpack-version }}
 

package.json

@@ -23,6 +23,7 @@
   "type": "module",
   "exports": {
     ".": {
+      "types": "./types/index.d.ts",
       "import": "./dist/esm/index.js",
       "require": "./dist/cjs/index.js",
       "default": "./dist/esm/index.js"
@@ -31,20 +32,24 @@
   },
   "main": "./dist/cjs/index.js",
   "module": "./dist/esm/index.js",
+  "types": "./types/index.d.ts",
   "files": [
-    "dist"
+    "dist",
+    "types"
   ],
   "scripts": {
     "start": "npm run build -- -w",
     "clean": "del-cli dist",
     "prebuild": "npm run clean",
     "build:esm": "babel src -d dist/esm --env-name esm --copy-files --no-copy-ignored && node -e \"require('fs').writeFileSync('dist/esm/package.json','{\\\"type\\\":\\\"module\\\"}\\n')\"",
     "build:cjs": "babel src -d dist/cjs --env-name cjs --copy-files --no-copy-ignored && node -e \"const fs=require('fs');fs.writeFileSync('dist/cjs/package.json','{\\\"type\\\":\\\"commonjs\\\"}\\n');fs.appendFileSync('dist/cjs/index.js','module.exports = exports.default;\\nmodule.exports.default = exports.default;\\n')\"",
+    "build:types": "tsc && prettier \"types/**/*.ts\" --write",
     "build": "npm-run-all -p \"build:*\"",
     "security": "npm audit --production",
     "lint": "npm-run-all -l -p \"lint:**\" && npm run fmt:check",
     "lint:code": "eslint --cache .",
     "lint:spelling": "cspell --cache --no-must-find-files --quiet \"**/*.*\"",
+    "lint:types": "tsc --pretty --noEmit",
     "fmt": "npm run fmt:check -- --write",
     "fmt:check": "prettier --list-different --cache --ignore-unknown .",
     "fix": "npm run fix:code && npm run fmt",
@@ -57,12 +62,16 @@
     "version": "changeset version",
     "release": "npm run build && changeset publish"
   },
+  "dependencies": {
+    "@types/less": "^3.0.8"
+  },
   "devDependencies": {
     "@babel/cli": "^7.24.7",
     "@babel/core": "^7.24.7",
     "@babel/preset-env": "^7.29.5",
     "@changesets/cli": "^2.30.0",
     "@changesets/get-github-info": "^0.8.0",
+    "@types/node": "^22.13.4",
     "cspell": "^10.0.0",
     "del": "^8.0.1",
     "del-cli": "^7.0.0",
@@ -75,6 +84,7 @@
     "memfs": "^4.57.2",
     "npm-run-all": "^4.1.5",
     "prettier": "^3.8.3",
+    "typescript": "^6.0.3",
     "webpack": "^5.107.0"
   },
   "peerDependencies": {

src/index.js

@@ -9,20 +9,20 @@ import {
   normalizeSourceMap,
 } from "./utils.js";
 
-/** @typedef {import("webpack").LoaderContext<import("./utils.js").LessLoaderOptions>} LoaderContext */
-/** @typedef {import("./utils.js").LessLoaderOptions} LessLoaderOptions */
+/** @typedef {import("webpack").LoaderContext<LoaderOptions>} LoaderContext */
+/** @typedef {import("schema-utils/declarations/validate").Schema} Schema */
+/** @typedef {import("./utils.js").LoaderOptions} LoaderOptions */
 /** @typedef {import("./utils.js").LessError} LessError */
 /** @typedef {import("./utils.js").SourceMap} SourceMap */
 
 /**
  * Webpack loader that compiles Less to CSS.
- *
  * @this {LoaderContext}
- * @param {string} source
- * @returns {Promise<void>}
+ * @param {string} content content
+ * @returns {Promise<void>} loader result
  */
-async function lessLoader(source) {
-  const options = /** @type {LessLoaderOptions} */ (this.getOptions(schema));
+async function lessLoader(content) {
+  const options = this.getOptions(/** @type {Schema} */ (schema));
   const callback = this.async();
   let implementation;
 
@@ -56,11 +56,12 @@ async function lessLoader(source) {
     lessOptions.sourceMap = {
       sourceMapBasepath: "",
       outputSourceFiles: true,
+      // @ts-expect-error bad types
       disableSourcemapAnnotation: true,
     };
   }
 
-  let data = source;
+  let data = content;
 
   if (typeof options.additionalData !== "undefined") {
     data =
@@ -72,7 +73,7 @@ async function lessLoader(source) {
   const logger = this.getLogger("less-loader");
   const loaderContext = this;
   const loggerListener = {
-    /** @param {string} message */
+    /** @param {string} message message */
     error(message) {
       // TODO enable by default in the next major release
       if (options.lessLogAsWarnOrErr) {
@@ -81,7 +82,7 @@ async function lessLoader(source) {
         logger.error(message);
       }
     },
-    /** @param {string} message */
+    /** @param {string} message message */
     warn(message) {
       // TODO enable by default in the next major release
       if (options.lessLogAsWarnOrErr) {
@@ -90,16 +91,17 @@ async function lessLoader(source) {
         logger.warn(message);
       }
     },
-    /** @param {string} message */
+    /** @param {string} message message */
     info(message) {
       logger.log(message);
     },
-    /** @param {string} message */
+    /** @param {string} message message */
     debug(message) {
       logger.debug(message);
     },
   };
 
+  // @ts-expect-error bad types
   implementation.logger.addListener(loggerListener);
 
   let result;
@@ -124,9 +126,12 @@ async function lessLoader(source) {
     return;
   } finally {
     // Fix memory leaks in `less`
+    // @ts-expect-error bad types
     implementation.logger.removeListener(loggerListener);
 
+    // @ts-expect-error we need it to reset loader context
     delete lessOptions.pluginManager.webpackLoaderContext;
+    // @ts-expect-error we need it to reset loader context
     delete lessOptions.pluginManager;
   }